18400202164 has 6 divisors (see below), whose sum is σ = 32200353794. Its totient is φ = 9200101080.

The previous prime is 18400202153. The next prime is 18400202207. The reversal of 18400202164 is 46120200481.

It can be written as a sum of positive squares in only one way, i.e., 18358082064 + 42120100 = 135492^2 + 6490^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2300025267 + ... + 2300025274.

Almost surely, 2^18400202164 is an apocalyptic number.

It is an amenable number.

18400202164 is a deficient number, since it is larger than the sum of its proper divisors (13800151630).

18400202164 is a wasteful number, since it uses less digits than its factorization.

18400202164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600050545 (or 4600050543 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 18400202164 in words is "eighteen billion, four hundred million, two hundred two thousand, one hundred sixty-four".