20371199 has 2 divisors, whose sum is σ = 20371200. Its totient is φ = 20371198.

The previous prime is 20371193. The next prime is 20371213. The reversal of 20371199 is 99117302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20371199 - 2²⁰ = 19322623 is a prime.

It is a Sophie Germain prime.

It is a zygodrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20371193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185599 + 10185600.

It is an arithmetic number, because the mean of its divisors is an integer number (10185600).

Almost surely, 2^20371199 is an apocalyptic number.

20371199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20371199 is an equidigital number, since it uses as much as digits as its factorization.

20371199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 20371199 is about 4513.4464658396. The cubic root of 20371199 is about 273.1107933166.

The spelling of 20371199 in words is "twenty million, three hundred seventy-one thousand, one hundred ninety-nine".