20858356924 has 48 divisors (see below), whose sum is σ = 39584160000. Its totient is φ = 9578693376.

The previous prime is 20858356919. The next prime is 20858356943. The reversal of 20858356924 is 42965385802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4088127 + ... + 4093225.

It is an arithmetic number, because the mean of its divisors is an integer number (824670000).

Almost surely, 2^20858356924 is an apocalyptic number.

It is an amenable number.

20858356924 is a deficient number, since it is larger than the sum of its proper divisors (18725803076).

20858356924 is a wasteful number, since it uses less digits than its factorization.

20858356924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562 (or 6560 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 20858356924 in words is "twenty billion, eight hundred fifty-eight million, three hundred fifty-six thousand, nine hundred twenty-four".