21429927574 has 32 divisors (see below), whose sum is σ = 35552332800. Its totient is φ = 9606392640.

The previous prime is 21429927559. The next prime is 21429927593. The reversal of 21429927574 is 47572992412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1590514 + ... + 1603930.

It is an arithmetic number, because the mean of its divisors is an integer number (1111010400).

Almost surely, 2^21429927574 is an apocalyptic number.

21429927574 is a deficient number, since it is larger than the sum of its proper divisors (14122405226).

21429927574 is a wasteful number, since it uses less digits than its factorization.

21429927574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428.

The product of its digits is 2540160, while the sum is 52.

The spelling of 21429927574 in words is "twenty-one billion, four hundred twenty-nine million, nine hundred twenty-seven thousand, five hundred seventy-four".