21423131258 has 8 divisors (see below), whose sum is σ = 32142858528. Its totient is φ = 10708845084.

The previous prime is 21423131251. The next prime is 21423131263. The reversal of 21423131258 is 85213132412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21423131251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350416 + ... + 1366187.

It is an arithmetic number, because the mean of its divisors is an integer number (4017857316).

Almost surely, 2^21423131258 is an apocalyptic number.

21423131258 is a deficient number, since it is larger than the sum of its proper divisors (10719727270).

21423131258 is a wasteful number, since it uses less digits than its factorization.

21423131258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720548.

The product of its digits is 11520, while the sum is 32.

The spelling of 21423131258 in words is "twenty-one billion, four hundred twenty-three million, one hundred thirty-one thousand, two hundred fifty-eight".