20337971 has 2 divisors, whose sum is σ = 20337972. Its totient is φ = 20337970.

The previous prime is 20337959. The next prime is 20337979. The reversal of 20337971 is 17973302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20337971 - 2²² = 16143667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20337979) 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 as a sum of consecutive naturals, namely, 10168985 + 10168986.

It is an arithmetic number, because the mean of its divisors is an integer number (10168986).

Almost surely, 2^20337971 is an apocalyptic number.

20337971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20337971 is an equidigital number, since it uses as much as digits as its factorization.

20337971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 20337971 is about 4509.7639627812. The cubic root of 20337971 is about 272.9622197671.

The spelling of 20337971 in words is "twenty million, three hundred thirty-seven thousand, nine hundred seventy-one".