21462742475 has 24 divisors (see below), whose sum is σ = 28025259840. Its totient is φ = 16260268320.

The previous prime is 21462742447. The next prime is 21462742481. The reversal of 21462742475 is 57424726412.

It is not a de Polignac number, because 21462742475 - 2⁸ = 21462742219 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1514372 + ... + 1528478.

It is an arithmetic number, because the mean of its divisors is an integer number (1167719160).

Almost surely, 2^21462742475 is an apocalyptic number.

21462742475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21462742475 is a deficient number, since it is larger than the sum of its proper divisors (6562517365).

21462742475 is a wasteful number, since it uses less digits than its factorization.

21462742475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17339 (or 17334 counting only the distinct ones).

The product of its digits is 752640, while the sum is 44.

The spelling of 21462742475 in words is "twenty-one billion, four hundred sixty-two million, seven hundred forty-two thousand, four hundred seventy-five".