21451133415304 has 8 divisors (see below), whose sum is σ = 40220875153710. Its totient is φ = 10725566707648.

The previous prime is 21451133415293. The next prime is 21451133415319. The reversal of 21451133415304 is 40351433115412.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20655116144100 + 796017271204 = 4544790^2 + 892198^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21451133415304² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340695838449 + ... + 1340695838464.

Almost surely, 2^{21451133415304} is an apocalyptic number.

It is an amenable number.

21451133415304 is a deficient number, since it is larger than the sum of its proper divisors (18769741738406).

21451133415304 is a wasteful number, since it uses less digits than its factorization.

21451133415304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681391676919 (or 2681391676915 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 21451133415304 in words is "twenty-one trillion, four hundred fifty-one billion, one hundred thirty-three million, four hundred fifteen thousand, three hundred four".