21366502762604 has 6 divisors (see below), whose sum is σ = 37391379834564. Its totient is φ = 10683251381300.

The previous prime is 21366502762531. The next prime is 21366502762663. The reversal of 21366502762604 is 40626720566312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2670812845322 + ... + 2670812845329.

It is an arithmetic number, because the mean of its divisors is an integer number (6231896639094).

Almost surely, 2^{21366502762604} is an apocalyptic number.

It is an amenable number.

21366502762604 is a deficient number, since it is larger than the sum of its proper divisors (16024877071960).

21366502762604 is a wasteful number, since it uses less digits than its factorization.

21366502762604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5341625690655 (or 5341625690653 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 21366502762604 in words is "twenty-one trillion, three hundred sixty-six billion, five hundred two million, seven hundred sixty-two thousand, six hundred four".