36816921 has 12 divisors (see below), whose sum is σ = 55014180. Its totient is φ = 23698080.

The previous prime is 36816877. The next prime is 36816943. The reversal of 36816921 is 12961863.

It can be written as a sum of positive squares in 2 ways, for example, as 26163225 + 10653696 = 5115^2 + 3264^2 .

It is not a de Polignac number, because 36816921 - 2¹¹ = 36814873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36816991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70270 + ... + 70791.

It is an arithmetic number, because the mean of its divisors is an integer number (4584515).

Almost surely, 2^36816921 is an apocalyptic number.

It is an amenable number.

36816921 is a deficient number, since it is larger than the sum of its proper divisors (18197259).

36816921 is a wasteful number, since it uses less digits than its factorization.

36816921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141096 (or 141093 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 36816921 is about 6067.6948670809. The cubic root of 36816921 is about 332.6716727069.

The spelling of 36816921 in words is "thirty-six million, eight hundred sixteen thousand, nine hundred twenty-one".