37345332821 has 2 divisors, whose sum is σ = 37345332822. Its totient is φ = 37345332820.

The previous prime is 37345332799. The next prime is 37345332833. The reversal of 37345332821 is 12823354373.

37345332821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34258308100 + 3087024721 = 185090^2 + 55561^2 .

It is an emirp because it is prime and its reverse (12823354373) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37345332821 - 2³⁰ = 36271590997 is a prime.

It is a super-2 number, since 2×37345332821² (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 (37345332421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18672666410 + 18672666411.

It is an arithmetic number, because the mean of its divisors is an integer number (18672666411).

Almost surely, 2^37345332821 is an apocalyptic number.

It is an amenable number.

37345332821 is a deficient number, since it is larger than the sum of its proper divisors (1).

37345332821 is an equidigital number, since it uses as much as digits as its factorization.

37345332821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 41.

The spelling of 37345332821 in words is "thirty-seven billion, three hundred forty-five million, three hundred thirty-two thousand, eight hundred twenty-one".