20046655720 has 64 divisors (see below), whose sum is σ = 55513825920. Its totient is φ = 6344434944.

The previous prime is 20046655669. The next prime is 20046655861. The reversal of 20046655720 is 2755664002.

It is a self number, because there is not a number n which added to its sum of digits gives 20046655720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750022 + ... + 2757301.

It is an arithmetic number, because the mean of its divisors is an integer number (867403530).

Almost surely, 2^20046655720 is an apocalyptic number.

20046655720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20046655720 is an abundant number, since it is smaller than the sum of its proper divisors (35467170200).

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

20046655720 is a wasteful number, since it uses less digits than its factorization.

20046655720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507354 (or 5507350 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 20046655720 in words is "twenty billion, forty-six million, six hundred fifty-five thousand, seven hundred twenty".