21431292519 has 16 divisors (see below), whose sum is σ = 35169300992. Its totient is φ = 11304417888.

The previous prime is 21431292481. The next prime is 21431292563. The reversal of 21431292519 is 91529213412.

It is not a de Polignac number, because 21431292519 - 2¹⁷ = 21431161447 is a prime.

It is a super-2 number, since 2×21431292519² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431292569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39251179 + ... + 39251724.

It is an arithmetic number, because the mean of its divisors is an integer number (2198081312).

Almost surely, 2^21431292519 is an apocalyptic number.

21431292519 is a deficient number, since it is larger than the sum of its proper divisors (13738008473).

21431292519 is a wasteful number, since it uses less digits than its factorization.

21431292519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78502926.

The product of its digits is 38880, while the sum is 39.

The spelling of 21431292519 in words is "twenty-one billion, four hundred thirty-one million, two hundred ninety-two thousand, five hundred nineteen".