20012200320 has 128 divisors (see below), whose sum is σ = 72901635840. Its totient is φ = 4574214144.

The previous prime is 20012200303. The next prime is 20012200337. The reversal of 20012200320 is 2300221002.

It is an interprime number because it is at equal distance from previous prime (20012200303) and next prime (20012200337).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20012200296 and 20012200305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731062 + ... + 757941.

It is an arithmetic number, because the mean of its divisors is an integer number (569544030).

Almost surely, 2^20012200320 is an apocalyptic number.

20012200320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012200320 is an abundant number, since it is smaller than the sum of its proper divisors (52889435520).

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

20012200320 is a wasteful number, since it uses less digits than its factorization.

20012200320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489032 (or 1489020 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20012200320 its reverse (2300221002), we get a palindrome (22312421322).

The spelling of 20012200320 in words is "twenty billion, twelve million, two hundred thousand, three hundred twenty".