36400420970021 has 2 divisors, whose sum is σ = 36400420970022. Its totient is φ = 36400420970020.

The previous prime is 36400420969933. The next prime is 36400420970083. The reversal of 36400420970021 is 12007902400463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36035708850625 + 364712119396 = 6002975^2 + 603914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36400420970021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36400420970621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18200210485010 + 18200210485011.

It is an arithmetic number, because the mean of its divisors is an integer number (18200210485011).

Almost surely, 2^{36400420970021} is an apocalyptic number.

It is an amenable number.

36400420970021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36400420970021 is an equidigital number, since it uses as much as digits as its factorization.

36400420970021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 36400420970021 in words is "thirty-six trillion, four hundred billion, four hundred twenty million, nine hundred seventy thousand, twenty-one".