20658883238 has 24 divisors (see below), whose sum is σ = 36198511200. Its totient is φ = 8816751888.

The previous prime is 20658883211. The next prime is 20658883261. The reversal of 20658883238 is 83238885602.

It is a self number, because there is not a number n which added to its sum of digits gives 20658883238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 417593 + ... + 464436.

It is an arithmetic number, because the mean of its divisors is an integer number (1508271300).

Almost surely, 2^20658883238 is an apocalyptic number.

20658883238 is a deficient number, since it is larger than the sum of its proper divisors (15539627962).

20658883238 is a wasteful number, since it uses less digits than its factorization.

20658883238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882284 (or 882277 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 20658883238 in words is "twenty billion, six hundred fifty-eight million, eight hundred eighty-three thousand, two hundred thirty-eight".