20908758392 has 16 divisors (see below), whose sum is σ = 41267286600. Its totient is φ = 9904148640.

The previous prime is 20908758389. The next prime is 20908758421. The reversal of 20908758392 is 29385780902.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 68778659 + ... + 68778962.

Almost surely, 2^20908758392 is an apocalyptic number.

It is an amenable number.

20908758392 is a deficient number, since it is larger than the sum of its proper divisors (20358528208).

20908758392 is a wasteful number, since it uses less digits than its factorization.

20908758392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137557646 (or 137557642 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 20908758392 in words is "twenty billion, nine hundred eight million, seven hundred fifty-eight thousand, three hundred ninety-two".