20493784512 has 112 divisors (see below), whose sum is σ = 63792018720. Its totient is φ = 6429413376.

The previous prime is 20493784499. The next prime is 20493784537. The reversal of 20493784512 is 21548739402.

20493784512 is a `hidden beast` number, since 20 + 4 + 9 + 37 + 84 + 512 = 666.

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, 319443 + ... + 378194.

Almost surely, 2^20493784512 is an apocalyptic number.

It is an amenable number.

20493784512 is an abundant number, since it is smaller than the sum of its proper divisors (43298234208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20493784512 is a wasteful number, since it uses less digits than its factorization.

20493784512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697675 (or 697659 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20493784512 in words is "twenty billion, four hundred ninety-three million, seven hundred eighty-four thousand, five hundred twelve".