20011650000 has 240 divisors, whose sum is σ = 65386440000. Its totient is φ = 5272960000.

The previous prime is 20011649963. The next prime is 20011650077. The reversal of 20011650000 is 5611002.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×20011650000² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13349251 + ... + 13350749.

It is an arithmetic number, because the mean of its divisors is an integer number (272443500).

Almost surely, 2^20011650000 is an apocalyptic number.

20011650000 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 20011650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32693220000).

20011650000 is an abundant number, since it is smaller than the sum of its proper divisors (45374790000).

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

20011650000 is an equidigital number, since it uses as much as digits as its factorization.

20011650000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The spelling of 20011650000 in words is "twenty billion, eleven million, six hundred fifty thousand".