20157936 has 120 divisors (see below), whose sum is σ = 59103360. Its totient is φ = 5892480.

The previous prime is 20157923. The next prime is 20157941. The reversal of 20157936 is 63975102.

It is a junction number, because it is equal to n+sod(n) for n = 20157897 and 20157906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 650241 + ... + 650271.

It is an arithmetic number, because the mean of its divisors is an integer number (492528).

Almost surely, 2^20157936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20157936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29551680).

20157936 is an abundant number, since it is smaller than the sum of its proper divisors (38945424).

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

20157936 is a wasteful number, since it uses less digits than its factorization.

20157936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 20157936 is about 4489.7590135775. The cubic root of 20157936 is about 272.1543961954.

The spelling of 20157936 in words is "twenty million, one hundred fifty-seven thousand, nine hundred thirty-six".