20365939 has 16 divisors (see below), whose sum is σ = 22879584. Its totient is φ = 17971200.

The previous prime is 20365901. The next prime is 20365957. The reversal of 20365939 is 93956302.

It is a cyclic number.

It is not a de Polignac number, because 20365939 - 2⁷ = 20365811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20365898 and 20365907.

It is not an unprimeable number, because it can be changed into a prime (20365979) 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 15 ways as a sum of consecutive naturals, for example, 105427 + ... + 105619.

It is an arithmetic number, because the mean of its divisors is an integer number (1429974).

Almost surely, 2^20365939 is an apocalyptic number.

20365939 is a deficient number, since it is larger than the sum of its proper divisors (2513645).

20365939 is a wasteful number, since it uses less digits than its factorization.

20365939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 20365939 is about 4512.8637249534. The cubic root of 20365939 is about 273.0872848585.

The spelling of 20365939 in words is "twenty million, three hundred sixty-five thousand, nine hundred thirty-nine".