20674331 has 2 divisors, whose sum is σ = 20674332. Its totient is φ = 20674330.

The previous prime is 20674327. The next prime is 20674333. The reversal of 20674331 is 13347602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20674331 - 2² = 20674327 is a prime.

It is a super-2 number, since 2×20674331² = 854855924595122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20674333, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20674331.

It is not a weakly prime, because it can be changed into another prime (20674333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337165 + 10337166.

It is an arithmetic number, because the mean of its divisors is an integer number (10337166).

Almost surely, 2^20674331 is an apocalyptic number.

20674331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20674331 is an equidigital number, since it uses as much as digits as its factorization.

20674331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20674331 is about 4546.9034518010. The cubic root of 20674331 is about 274.4587967614.

The spelling of 20674331 in words is "twenty million, six hundred seventy-four thousand, three hundred thirty-one".