21602468 has 12 divisors (see below), whose sum is σ = 39794160. Its totient is φ = 10232712.

The previous prime is 21602459. The next prime is 21602473. The reversal of 21602468 is 86420612.

It is a self number, because there is not a number n which added to its sum of digits gives 21602468.

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, 142046 + ... + 142197.

It is an arithmetic number, because the mean of its divisors is an integer number (3316180).

Almost surely, 2^21602468 is an apocalyptic number.

It is an amenable number.

21602468 is a deficient number, since it is larger than the sum of its proper divisors (18191692).

21602468 is a wasteful number, since it uses less digits than its factorization.

21602468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284266 (or 284264 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21602468 is about 4647.8455223899. The cubic root of 21602468 is about 278.5059365029.

The spelling of 21602468 in words is "twenty-one million, six hundred two thousand, four hundred sixty-eight".