20939496 has 16 divisors (see below), whose sum is σ = 52348800. Its totient is φ = 6979824.

The previous prime is 20939483. The next prime is 20939497. The reversal of 20939496 is 69493902.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20939497) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 436216 + ... + 436263.

It is an arithmetic number, because the mean of its divisors is an integer number (3271800).

Almost surely, 2^20939496 is an apocalyptic number.

It is an amenable number.

20939496 is an abundant number, since it is smaller than the sum of its proper divisors (31409304).

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

20939496 is a wasteful number, since it uses less digits than its factorization.

20939496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872488 (or 872484 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 20939496 is about 4575.9694054921. The cubic root of 20939496 is about 275.6272009429.

The spelling of 20939496 in words is "twenty million, nine hundred thirty-nine thousand, four hundred ninety-six".