20920383 has 16 divisors (see below), whose sum is σ = 33811200. Its totient is φ = 12678840.

The previous prime is 20920379. The next prime is 20920391. The reversal of 20920383 is 38302902.

It is not a de Polignac number, because 20920383 - 2² = 20920379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34923 + ... + 35516.

It is an arithmetic number, because the mean of its divisors is an integer number (2113200).

Almost surely, 2^20920383 is an apocalyptic number.

20920383 is a deficient number, since it is larger than the sum of its proper divisors (12890817).

20920383 is a wasteful number, since it uses less digits than its factorization.

20920383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70459 (or 70453 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20920383 is about 4573.8805187718. The cubic root of 20920383 is about 275.5433137543.

The spelling of 20920383 in words is "twenty million, nine hundred twenty thousand, three hundred eighty-three".