20783428624 has 20 divisors (see below), whose sum is σ = 46020449344. Its totient is φ = 8907183648.

The previous prime is 20783428583. The next prime is 20783428643. The reversal of 20783428624 is 42682438702.

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, 92783052 + ... + 92783275.

Almost surely, 2^20783428624 is an apocalyptic number.

It is an amenable number.

20783428624 is an abundant number, since it is smaller than the sum of its proper divisors (25237020720).

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

20783428624 is a wasteful number, since it uses less digits than its factorization.

20783428624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185566342 (or 185566336 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 46.

The spelling of 20783428624 in words is "twenty billion, seven hundred eighty-three million, four hundred twenty-eight thousand, six hundred twenty-four".