20936312 has 16 divisors (see below), whose sum is σ = 39363840. Its totient is φ = 10439296.

The previous prime is 20936303. The next prime is 20936317. The reversal of 20936312 is 21363902.

It is a super-2 number, since 2×20936312² = 876658320322688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (2460240).

Almost surely, 2^20936312 is an apocalyptic number.

It is an amenable number.

20936312 is a deficient number, since it is larger than the sum of its proper divisors (18427528).

20936312 is a wasteful number, since it uses less digits than its factorization.

20936312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7222 (or 7218 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20936312 is about 4575.6214878418. The cubic root of 20936312 is about 275.6132298729.

The spelling of 20936312 in words is "twenty million, nine hundred thirty-six thousand, three hundred twelve".