20446464156 has 12 divisors (see below), whose sum is σ = 47708416392. Its totient is φ = 6815488048.

The previous prime is 20446464151. The next prime is 20446464163. The reversal of 20446464156 is 65146464402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446464151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851935995 + ... + 851936018.

It is an arithmetic number, because the mean of its divisors is an integer number (3975701366).

Almost surely, 2^20446464156 is an apocalyptic number.

It is an amenable number.

20446464156 is an abundant number, since it is smaller than the sum of its proper divisors (27261952236).

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

20446464156 is a wasteful number, since it uses less digits than its factorization.

20446464156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703872020 (or 1703872018 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 20446464156 in words is "twenty billion, four hundred forty-six million, four hundred sixty-four thousand, one hundred fifty-six".