20456097172 has 12 divisors (see below), whose sum is σ = 40912194400. Its totient is φ = 8766898776.

The previous prime is 20456097139. The next prime is 20456097173. The reversal of 20456097172 is 27179065402.

20456097172 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20456097173) 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, 365287422 + ... + 365287477.

Almost surely, 2^20456097172 is an apocalyptic number.

It is an amenable number.

20456097172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20456097172 is a wasteful number, since it uses less digits than its factorization.

20456097172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730574910 (or 730574908 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 20456097172 in words is "twenty billion, four hundred fifty-six million, ninety-seven thousand, one hundred seventy-two".