21474647412 has 24 divisors (see below), whose sum is σ = 51461768736. Its totient is φ = 6964750368.

The previous prime is 21474647357. The next prime is 21474647443.

It is a happy number.

21474647412 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21474647412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24182718 + ... + 24183605.

It is an arithmetic number, because the mean of its divisors is an integer number (2144240364).

Almost surely, 2^21474647412 is an apocalyptic number.

It is an amenable number.

21474647412 is an abundant number, since it is smaller than the sum of its proper divisors (29987121324).

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

21474647412 is a wasteful number, since it uses less digits than its factorization.

21474647412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48366367 (or 48366365 counting only the distinct ones).

The product of its digits is 301056, while the sum is 42.

The spelling of 21474647412 in words is "twenty-one billion, four hundred seventy-four million, six hundred forty-seven thousand, four hundred twelve".