21476173719 has 96 divisors (see below), whose sum is σ = 38977469440. Its totient is φ = 10295588160.

The previous prime is 21476173717. The next prime is 21476173751. The reversal of 21476173719 is 91737167412.

It is not a de Polignac number, because 21476173719 - 2¹ = 21476173717 is a prime.

It is a super-2 number, since 2×21476173719² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21476173711) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5580654 + ... + 5584500.

Almost surely, 2^21476173719 is an apocalyptic number.

21476173719 is a deficient number, since it is larger than the sum of its proper divisors (17501295721).

21476173719 is a wasteful number, since it uses less digits than its factorization.

21476173719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918 (or 3881 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The spelling of 21476173719 in words is "twenty-one billion, four hundred seventy-six million, one hundred seventy-three thousand, seven hundred nineteen".