37420475621 has 2 divisors, whose sum is σ = 37420475622. Its totient is φ = 37420475620.

The previous prime is 37420475611. The next prime is 37420475639. The reversal of 37420475621 is 12657402473.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37127894596 + 292581025 = 192686^2 + 17105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37420475621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37420475611) 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, 18710237810 + 18710237811.

It is an arithmetic number, because the mean of its divisors is an integer number (18710237811).

Almost surely, 2^37420475621 is an apocalyptic number.

It is an amenable number.

37420475621 is a deficient number, since it is larger than the sum of its proper divisors (1).

37420475621 is an equidigital number, since it uses as much as digits as its factorization.

37420475621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 37420475621 in words is "thirty-seven billion, four hundred twenty million, four hundred seventy-five thousand, six hundred twenty-one".