37827617021 has 2 divisors, whose sum is σ = 37827617022. Its totient is φ = 37827617020.

The previous prime is 37827616987. The next prime is 37827617029. The reversal of 37827617021 is 12071672873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36208761796 + 1618855225 = 190286^2 + 40235^2 .

It is a cyclic number.

It is not a de Polignac number, because 37827617021 - 2¹⁰ = 37827615997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37827617029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18913808510 + 18913808511.

It is an arithmetic number, because the mean of its divisors is an integer number (18913808511).

Almost surely, 2^37827617021 is an apocalyptic number.

It is an amenable number.

37827617021 is a deficient number, since it is larger than the sum of its proper divisors (1).

37827617021 is an equidigital number, since it uses as much as digits as its factorization.

37827617021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 37827617021 in words is "thirty-seven billion, eight hundred twenty-seven million, six hundred seventeen thousand, twenty-one".