21164003624404 has 12 divisors (see below), whose sum is σ = 37143129572500. Its totient is φ = 10551680889408.

The previous prime is 21164003624399. The next prime is 21164003624417. The reversal of 21164003624404 is 40442630046112.

It can be written as a sum of positive squares in 2 ways, for example, as 16973180501904 + 4190823122500 = 4119852^2 + 2047150^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7580229129 + ... + 7580231920.

Almost surely, 2^{21164003624404} is an apocalyptic number.

It is an amenable number.

21164003624404 is a deficient number, since it is larger than the sum of its proper divisors (15979125948096).

21164003624404 is a wasteful number, since it uses less digits than its factorization.

21164003624404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15160461402 (or 15160461400 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 21164003624404 in words is "twenty-one trillion, one hundred sixty-four billion, three million, six hundred twenty-four thousand, four hundred four".