21460477671 has 12 divisors (see below), whose sum is σ = 31022311320. Its totient is φ = 14295980400.

The previous prime is 21460477667. The next prime is 21460477691. The reversal of 21460477671 is 17677406412.

It is not a de Polignac number, because 21460477671 - 2² = 21460477667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460477691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 904701 + ... + 928118.

It is an arithmetic number, because the mean of its divisors is an integer number (2585192610).

Almost surely, 2^21460477671 is an apocalyptic number.

21460477671 is a deficient number, since it is larger than the sum of its proper divisors (9561833649).

21460477671 is a wasteful number, since it uses less digits than its factorization.

21460477671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834126 (or 1834123 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 21460477671 in words is "twenty-one billion, four hundred sixty million, four hundred seventy-seven thousand, six hundred seventy-one".