20633106557 has 8 divisors (see below), whose sum is σ = 24393820800. Its totient is φ = 17075674224.

The previous prime is 20633106553. The next prime is 20633106619. The reversal of 20633106557 is 75560133602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20633106557 - 2² = 20633106553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20633106557.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50820257 + ... + 50820662.

It is an arithmetic number, because the mean of its divisors is an integer number (3049227600).

Almost surely, 2^20633106557 is an apocalyptic number.

It is an amenable number.

20633106557 is a deficient number, since it is larger than the sum of its proper divisors (3760714243).

20633106557 is a wasteful number, since it uses less digits than its factorization.

20633106557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101640955.

The product of its (nonzero) digits is 113400, while the sum is 38.

The spelling of 20633106557 in words is "twenty billion, six hundred thirty-three million, one hundred six thousand, five hundred fifty-seven".