20364920 has 16 divisors (see below), whose sum is σ = 45821160. Its totient is φ = 8145952.

The previous prime is 20364907. The next prime is 20364943. The reversal of 20364920 is 2946302.

It is a self number, because there is not a number n which added to its sum of digits gives 20364920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254522 + ... + 254601.

Almost surely, 2^20364920 is an apocalyptic number.

20364920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20364920 is an abundant number, since it is smaller than the sum of its proper divisors (25456240).

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

20364920 is a wasteful number, since it uses less digits than its factorization.

20364920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509134 (or 509130 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20364920 is about 4512.7508240540. The cubic root of 20364920 is about 273.0827301854.

The spelling of 20364920 in words is "twenty million, three hundred sixty-four thousand, nine hundred twenty".