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20313321000 = 2335371396959
BaseRepresentation
bin10010111010110001…
…001010111000101000
31221102200002121212020
4102322301022320220
5313100202233000
613155400544440
71316245244130
oct227261127050
957380077766
1020313321000
1186843817a5
123b2aa82120
131bb958aa8b
14da9b65ac0
157dd50bba0
hex4bac4ae28

20313321000 has 256 divisors, whose sum is σ = 72963072000. Its totient is φ = 4608979200.

The previous prime is 20313320977. The next prime is 20313321001. The reversal of 20313321000 is 12331302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20313321001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2915521 + ... + 2922479.

It is an arithmetic number, because the mean of its divisors is an integer number (285012000).

Almost surely, 220313321000 is an apocalyptic number.

20313321000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20313321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36481536000).

20313321000 is an abundant number, since it is smaller than the sum of its proper divisors (52649751000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20313321000 is a wasteful number, since it uses less digits than its factorization.

20313321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129 (or 7115 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20313321000 its reverse (12331302), we get a palindrome (20325652302).

The spelling of 20313321000 in words is "twenty billion, three hundred thirteen million, three hundred twenty-one thousand".