21482987239 has 12 divisors (see below), whose sum is σ = 25181187768. Its totient is φ = 18273418800.

The previous prime is 21482987237. The next prime is 21482987263. The reversal of 21482987239 is 93278928412.

It is not a de Polignac number, because 21482987239 - 2¹ = 21482987237 is a prime.

It is a super-2 number, since 2×21482987239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21482987239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21482987237) 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, 1666972 + ... + 1679809.

It is an arithmetic number, because the mean of its divisors is an integer number (2098432314).

Almost surely, 2^21482987239 is an apocalyptic number.

21482987239 is a deficient number, since it is larger than the sum of its proper divisors (3698200529).

21482987239 is a wasteful number, since it uses less digits than its factorization.

21482987239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346926 (or 3346919 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The spelling of 21482987239 in words is "twenty-one billion, four hundred eighty-two million, nine hundred eighty-seven thousand, two hundred thirty-nine".