21476637254417 has 8 divisors (see below), whose sum is σ = 22742745219072. Its totient is φ = 20210837774400.

The previous prime is 21476637254407. The next prime is 21476637254503. The reversal of 21476637254417 is 71445273667412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21476637254417 - 2²⁰ = 21476636205841 is a prime.

It is a super-2 number, since 2×21476637254417² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21476637254407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76977809 + ... + 77256302.

It is an arithmetic number, because the mean of its divisors is an integer number (2842843152384).

Almost surely, 2^{21476637254417} is an apocalyptic number.

It is an amenable number.

21476637254417 is a deficient number, since it is larger than the sum of its proper divisors (1266107964655).

21476637254417 is a wasteful number, since it uses less digits than its factorization.

21476637254417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154242319.

The product of its digits is 47416320, while the sum is 59.

The spelling of 21476637254417 in words is "twenty-one trillion, four hundred seventy-six billion, six hundred thirty-seven million, two hundred fifty-four thousand, four hundred seventeen".