20674931 has 2 divisors, whose sum is σ = 20674932. Its totient is φ = 20674930.

The previous prime is 20674921. The next prime is 20674937. The reversal of 20674931 is 13947602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20674931 - 2⁶ = 20674867 is a prime.

It is a super-2 number, since 2×20674931² = 854905543709522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20674937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337465 + 10337466.

It is an arithmetic number, because the mean of its divisors is an integer number (10337466).

Almost surely, 2^20674931 is an apocalyptic number.

20674931 is a deficient number, since it is larger than the sum of its proper divisors (1).

20674931 is an equidigital number, since it uses as much as digits as its factorization.

20674931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20674931 is about 4546.9694302909. The cubic root of 20674931 is about 274.4614518039.

The spelling of 20674931 in words is "twenty million, six hundred seventy-four thousand, nine hundred thirty-one".