20393912 has 32 divisors (see below), whose sum is σ = 47675520. Its totient is φ = 7945440.

The previous prime is 20393861. The next prime is 20393917. The reversal of 20393912 is 21939302.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20393917) 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, 15938 + ... + 17169.

It is an arithmetic number, because the mean of its divisors is an integer number (1489860).

Almost surely, 2^20393912 is an apocalyptic number.

20393912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20393912 is an abundant number, since it is smaller than the sum of its proper divisors (27281608).

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

20393912 is a wasteful number, since it uses less digits than its factorization.

20393912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33131 (or 33127 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 20393912 is about 4515.9619130369. The cubic root of 20393912 is about 273.2122578312.

The spelling of 20393912 in words is "twenty million, three hundred ninety-three thousand, nine hundred twelve".