20936156 has 6 divisors (see below), whose sum is σ = 36638280. Its totient is φ = 10468076.

The previous prime is 20936137. The next prime is 20936171. The reversal of 20936156 is 65163902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2617016 + ... + 2617023.

It is an arithmetic number, because the mean of its divisors is an integer number (6106380).

Almost surely, 2^20936156 is an apocalyptic number.

It is an amenable number.

20936156 is a deficient number, since it is larger than the sum of its proper divisors (15702124).

20936156 is a wasteful number, since it uses less digits than its factorization.

20936156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234043 (or 5234041 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20936156 is about 4575.6044409455. The cubic root of 20936156 is about 275.6125453243.

The spelling of 20936156 in words is "twenty million, nine hundred thirty-six thousand, one hundred fifty-six".