20365947 has 24 divisors (see below), whose sum is σ = 34532576. Its totient is φ = 11321856.

The previous prime is 20365901. The next prime is 20365957. The reversal of 20365947 is 74956302.

It is not a de Polignac number, because 20365947 - 2⁷ = 20365819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2038 + ... + 6699.

Almost surely, 2^20365947 is an apocalyptic number.

20365947 is a deficient number, since it is larger than the sum of its proper divisors (14166629).

20365947 is a wasteful number, since it uses less digits than its factorization.

20365947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8787 (or 8784 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20365947 is about 4512.8646113084. The cubic root of 20365947 is about 273.0873206159.

It can be divided in two parts, 20365 and 947, that added together give a palindrome (21312).

The spelling of 20365947 in words is "twenty million, three hundred sixty-five thousand, nine hundred forty-seven".