37244444021 has 2 divisors, whose sum is σ = 37244444022. Its totient is φ = 37244444020.

The previous prime is 37244443981. The next prime is 37244444047. The reversal of 37244444021 is 12044444273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24719700625 + 12524743396 = 157225^2 + 111914^2 .

It is an emirp because it is prime and its reverse (12044444273) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37244444021 is a prime.

It is a super-2 number, since 2×37244444021² (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 (37244441021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18622222010 + 18622222011.

It is an arithmetic number, because the mean of its divisors is an integer number (18622222011).

Almost surely, 2^37244444021 is an apocalyptic number.

It is an amenable number.

37244444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

37244444021 is an equidigital number, since it uses as much as digits as its factorization.

37244444021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 35.

Adding to 37244444021 its reverse (12044444273), we get a palindrome (49288888294).

The spelling of 37244444021 in words is "thirty-seven billion, two hundred forty-four million, four hundred forty-four thousand, twenty-one".