36397935421 has 2 divisors, whose sum is σ = 36397935422. Its totient is φ = 36397935420.

The previous prime is 36397935407. The next prime is 36397935433. The reversal of 36397935421 is 12453979363.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32837426521 + 3560508900 = 181211^2 + 59670^2 .

It is a cyclic number.

It is not a de Polignac number, because 36397935421 - 2¹⁷ = 36397804349 is a prime.

It is a super-2 number, since 2×36397935421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36397935521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18198967710 + 18198967711.

It is an arithmetic number, because the mean of its divisors is an integer number (18198967711).

Almost surely, 2^36397935421 is an apocalyptic number.

It is an amenable number.

36397935421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36397935421 is an equidigital number, since it uses as much as digits as its factorization.

36397935421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 52.

The spelling of 36397935421 in words is "thirty-six billion, three hundred ninety-seven million, nine hundred thirty-five thousand, four hundred twenty-one".