20642053456 has 20 divisors (see below), whose sum is σ = 39996236704. Its totient is φ = 10320444000.

The previous prime is 20642053441. The next prime is 20642053489. The reversal of 20642053456 is 65435024602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465031 + ... + 507481.

Almost surely, 2^20642053456 is an apocalyptic number.

It is an amenable number.

20642053456 is a deficient number, since it is larger than the sum of its proper divisors (19354183248).

20642053456 is a wasteful number, since it uses less digits than its factorization.

20642053456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72850 (or 72844 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 20642053456 in words is "twenty billion, six hundred forty-two million, fifty-three thousand, four hundred fifty-six".