21699741424 has 20 divisors (see below), whose sum is σ = 42301188136. Its totient is φ = 10783305792.

The previous prime is 21699741419. The next prime is 21699741439. The reversal of 21699741424 is 42414799612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4157619 + ... + 4162834.

Almost surely, 2^21699741424 is an apocalyptic number.

It is an amenable number.

21699741424 is a deficient number, since it is larger than the sum of its proper divisors (20601446712).

21699741424 is a wasteful number, since it uses less digits than its factorization.

21699741424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320624 (or 8320618 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The spelling of 21699741424 in words is "twenty-one billion, six hundred ninety-nine million, seven hundred forty-one thousand, four hundred twenty-four".