20633106556 has 12 divisors (see below), whose sum is σ = 36564999520. Its totient is φ = 10185963840.

The previous prime is 20633106553. The next prime is 20633106619. The reversal of 20633106556 is 65560133602.

It is a super-2 number, since 2×20633106556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20633106553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32647005 + ... + 32647636.

Almost surely, 2^20633106556 is an apocalyptic number.

It is an amenable number.

20633106556 is a deficient number, since it is larger than the sum of its proper divisors (15931892964).

20633106556 is a wasteful number, since it uses less digits than its factorization.

20633106556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65294724 (or 65294722 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 20633106556 in words is "twenty billion, six hundred thirty-three million, one hundred six thousand, five hundred fifty-six".