20533085616 has 20 divisors (see below), whose sum is σ = 53043804632. Its totient is φ = 6844361856.

The previous prime is 20533085609. The next prime is 20533085627. The reversal of 20533085616 is 61658033502.

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, 213886261 + ... + 213886356.

Almost surely, 2^20533085616 is an apocalyptic number.

It is an amenable number.

20533085616 is an abundant number, since it is smaller than the sum of its proper divisors (32510719016).

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

20533085616 is a wasteful number, since it uses less digits than its factorization.

20533085616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427772628 (or 427772622 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20533085616 in words is "twenty billion, five hundred thirty-three million, eighty-five thousand, six hundred sixteen".