20157933 has 8 divisors (see below), whose sum is σ = 27603808. Its totient is φ = 13075344.

The previous prime is 20157923. The next prime is 20157941. The reversal of 20157933 is 33975102.

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

It is not a de Polignac number, because 20157933 - 2⁸ = 20157677 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 20157933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90691 + ... + 90912.

It is an arithmetic number, because the mean of its divisors is an integer number (3450476).

Almost surely, 2^20157933 is an apocalyptic number.

It is an amenable number.

20157933 is a deficient number, since it is larger than the sum of its proper divisors (7445875).

20157933 is a wasteful number, since it uses less digits than its factorization.

20157933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181643.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 20157933 is about 4489.7586794838. The cubic root of 20157933 is about 272.1543826943.

The spelling of 20157933 in words is "twenty million, one hundred fifty-seven thousand, nine hundred thirty-three".