20923474628 has 48 divisors (see below), whose sum is σ = 42347647104. Its totient is φ = 8860216320.

The previous prime is 20923474597. The next prime is 20923474643. The reversal of 20923474628 is 82647432902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740398 + ... + 1752378.

It is an arithmetic number, because the mean of its divisors is an integer number (882242648).

Almost surely, 2^20923474628 is an apocalyptic number.

20923474628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20923474628 is an abundant number, since it is smaller than the sum of its proper divisors (21424172476).

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

20923474628 is a wasteful number, since it uses less digits than its factorization.

20923474628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732 (or 12730 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 20923474628 in words is "twenty billion, nine hundred twenty-three million, four hundred seventy-four thousand, six hundred twenty-eight".