21524494 has 8 divisors (see below), whose sum is σ = 32619888. Its totient is φ = 10651200.

The previous prime is 21524483. The next prime is 21524501. The reversal of 21524494 is 49442512.

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

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, 55282 + ... + 55669.

It is an arithmetic number, because the mean of its divisors is an integer number (4077486).

Almost surely, 2^21524494 is an apocalyptic number.

21524494 is a deficient number, since it is larger than the sum of its proper divisors (11095394).

21524494 is a wasteful number, since it uses less digits than its factorization.

21524494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111050.

The product of its digits is 11520, while the sum is 31.

The square root of 21524494 is about 4639.4497518564. The cubic root of 21524494 is about 278.1704439315.

The spelling of 21524494 in words is "twenty-one million, five hundred twenty-four thousand, four hundred ninety-four".