37421813 has 16 divisors (see below), whose sum is σ = 44416512. Its totient is φ = 31080000.

The previous prime is 37421809. The next prime is 37421819. The reversal of 37421813 is 31812473.

37421813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 37421813 - 2² = 37421809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37421819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13148 + ... + 15738.

It is an arithmetic number, because the mean of its divisors is an integer number (2776032).

Almost surely, 2^37421813 is an apocalyptic number.

It is an amenable number.

37421813 is a deficient number, since it is larger than the sum of its proper divisors (6994699).

37421813 is a wasteful number, since it uses less digits than its factorization.

37421813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716.

The product of its digits is 4032, while the sum is 29.

The square root of 37421813 is about 6117.3370840587. The cubic root of 37421813 is about 334.4836867167.

It can be divided in two parts, 3742 and 1813, that added together give a palindrome (5555).

The spelling of 37421813 in words is "thirty-seven million, four hundred twenty-one thousand, eight hundred thirteen".