20172792948 has 72 divisors (see below), whose sum is σ = 59732445024. Its totient is φ = 5239684800.

The previous prime is 20172792931. The next prime is 20172792953. The reversal of 20172792948 is 84929727102.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20172792948.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1552963 + ... + 1565898.

It is an arithmetic number, because the mean of its divisors is an integer number (829617292).

Almost surely, 2^20172792948 is an apocalyptic number.

20172792948 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20172792948 is an abundant number, since it is smaller than the sum of its proper divisors (39559652076).

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

20172792948 is a wasteful number, since it uses less digits than its factorization.

20172792948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118893 (or 3118884 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 20172792948 in words is "twenty billion, one hundred seventy-two million, seven hundred ninety-two thousand, nine hundred forty-eight".