36802201921 has 9 divisors (see below), whose sum is σ = 37729773283. Its totient is φ = 35896913680.

The previous prime is 36802201913. The next prime is 36802201927. The reversal of 36802201921 is 12910220863.

The square root of 36802201921 is 191839.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1773336321 + 35028865600 = 42111^2 + 187160^2 .

It is not a de Polignac number, because 36802201921 - 2³ = 36802201913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36802201927) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7863060 + ... + 7867738.

Almost surely, 2^36802201921 is an apocalyptic number.

36802201921 is the 191839-th square number.

36802201921 is the 95920-th centered octagonal number.

It is an amenable number.

36802201921 is a deficient number, since it is larger than the sum of its proper divisors (927571362).

36802201921 is an frugal number, since it uses more digits than its factorization.

36802201921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440 (or 4720 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 36802201921 in words is "thirty-six billion, eight hundred two million, two hundred one thousand, nine hundred twenty-one".