21473437412 has 12 divisors (see below), whose sum is σ = 42946874880. Its totient is φ = 9202901736.

The previous prime is 21473437393. The next prime is 21473437439.

21473437412 is nontrivially palindromic in base 10.

21473437412 is an admirable number.

It is a super-2 number, since 2×21473437412² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383454212 + ... + 383454267.

It is an arithmetic number, because the mean of its divisors is an integer number (3578906240).

Almost surely, 2^21473437412 is an apocalyptic number.

It is an amenable number.

21473437412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21473437412 is a wasteful number, since it uses less digits than its factorization.

21473437412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766908490 (or 766908488 counting only the distinct ones).

The product of its digits is 112896, while the sum is 38.

The spelling of 21473437412 in words is "twenty-one billion, four hundred seventy-three million, four hundred thirty-seven thousand, four hundred twelve".