38721720227 has 2 divisors, whose sum is σ = 38721720228. Its totient is φ = 38721720226.

The previous prime is 38721720221. The next prime is 38721720251. The reversal of 38721720227 is 72202712783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38721720227 - 2²⁶ = 38654611363 is a prime.

It is not a weakly prime, because it can be changed into another prime (38721720221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360860113 + 19360860114.

It is an arithmetic number, because the mean of its divisors is an integer number (19360860114).

Almost surely, 2^38721720227 is an apocalyptic number.

38721720227 is a deficient number, since it is larger than the sum of its proper divisors (1).

38721720227 is an equidigital number, since it uses as much as digits as its factorization.

38721720227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 38721720227 in words is "thirty-eight billion, seven hundred twenty-one million, seven hundred twenty thousand, two hundred twenty-seven".