20557331933 has 8 divisors (see below), whose sum is σ = 20639406816. Its totient is φ = 20475378000.

The previous prime is 20557331891. The next prime is 20557331939. The reversal of 20557331933 is 33913375502.

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

It is a cyclic number.

It is not a de Polignac number, because 20557331933 - 2⁸ = 20557331677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20557331939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318335 + ... + 377427.

It is an arithmetic number, because the mean of its divisors is an integer number (2579925852).

Almost surely, 2^20557331933 is an apocalyptic number.

It is an amenable number.

20557331933 is a deficient number, since it is larger than the sum of its proper divisors (82074883).

20557331933 is a wasteful number, since it uses less digits than its factorization.

20557331933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60475.

The product of its (nonzero) digits is 255150, while the sum is 41.

The spelling of 20557331933 in words is "twenty billion, five hundred fifty-seven million, three hundred thirty-one thousand, nine hundred thirty-three".