20745793156 has 27 divisors (see below), whose sum is σ = 39911743767. Its totient is φ = 9428465640.

The previous prime is 20745793097. The next prime is 20745793163. The reversal of 20745793156 is 65139754702.

The square root of 20745793156 is 144034.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3165475 + ... + 3172021.

Almost surely, 2^20745793156 is an apocalyptic number.

20745793156 is the 144034-th square number.

It is an amenable number.

20745793156 is a deficient number, since it is larger than the sum of its proper divisors (19165950611).

20745793156 is an frugal number, since it uses more digits than its factorization.

20745793156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120 (or 6560 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 49.

Multiplying 20745793156 by its sum of digits (49), we get a square (1016543864644 = 1008238²).

The spelling of 20745793156 in words is "twenty billion, seven hundred forty-five million, seven hundred ninety-three thousand, one hundred fifty-six".