21455450302408 has 8 divisors (see below), whose sum is σ = 40228969317030. Its totient is φ = 10727725151200.

The previous prime is 21455450302373. The next prime is 21455450302421. The reversal of 21455450302408 is 80420305455412.

It can be written as a sum of positive squares in only one way, i.e., 12177322118404 + 9278128184004 = 3489602^2 + 3046002^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340965643893 + ... + 1340965643908.

Almost surely, 2^{21455450302408} is an apocalyptic number.

It is an amenable number.

21455450302408 is a deficient number, since it is larger than the sum of its proper divisors (18773519014622).

21455450302408 is a wasteful number, since it uses less digits than its factorization.

21455450302408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681931287807 (or 2681931287803 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 43.

The spelling of 21455450302408 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, three hundred two thousand, four hundred eight".