21479458512 has 40 divisors (see below), whose sum is σ = 56841986880. Its totient is φ = 6985189120.

The previous prime is 21479458501. The next prime is 21479458543. The reversal of 21479458512 is 21585497412.

It is a super-2 number, since 2×21479458512² (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 Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5455212 + ... + 5459147.

It is an arithmetic number, because the mean of its divisors is an integer number (1421049672).

Almost surely, 2^21479458512 is an apocalyptic number.

It is an amenable number.

21479458512 is an abundant number, since it is smaller than the sum of its proper divisors (35362528368).

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

21479458512 is a wasteful number, since it uses less digits than its factorization.

21479458512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914411 (or 10914405 counting only the distinct ones).

The product of its digits is 806400, while the sum is 48.

The spelling of 21479458512 in words is "twenty-one billion, four hundred seventy-nine million, four hundred fifty-eight thousand, five hundred twelve".