21377547417 has 8 divisors (see below), whose sum is σ = 28970665600. Its totient is φ = 14018063760.

The previous prime is 21377547341. The next prime is 21377547419. The reversal of 21377547417 is 71474577312.

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

It is not a de Polignac number, because 21377547417 - 2²³ = 21369158809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21377547419) 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, 58408417 + ... + 58408782.

It is an arithmetic number, because the mean of its divisors is an integer number (3621333200).

Almost surely, 2^21377547417 is an apocalyptic number.

It is an amenable number.

21377547417 is a deficient number, since it is larger than the sum of its proper divisors (7593118183).

21377547417 is a wasteful number, since it uses less digits than its factorization.

21377547417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116817263.

The product of its digits is 1152480, while the sum is 48.

The spelling of 21377547417 in words is "twenty-one billion, three hundred seventy-seven million, five hundred forty-seven thousand, four hundred seventeen".