20508487924 has 12 divisors (see below), whose sum is σ = 37450282464. Its totient is φ = 9808407224.

The previous prime is 20508487849. The next prime is 20508487949. The reversal of 20508487924 is 42978480502.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 111459082 + ... + 111459265.

It is an arithmetic number, because the mean of its divisors is an integer number (3120856872).

Almost surely, 2^20508487924 is an apocalyptic number.

It is an amenable number.

20508487924 is a deficient number, since it is larger than the sum of its proper divisors (16941794540).

20508487924 is a wasteful number, since it uses less digits than its factorization.

20508487924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222918374 (or 222918372 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 20508487924 in words is "twenty billion, five hundred eight million, four hundred eighty-seven thousand, nine hundred twenty-four".