21852738 has 24 divisors (see below), whose sum is σ = 47921328. Its totient is φ = 7195992.

The previous prime is 21852683. The next prime is 21852749. The reversal of 21852738 is 83725812.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5820 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (1996722).

Almost surely, 2^21852738 is an apocalyptic number.

21852738 is an abundant number, since it is smaller than the sum of its proper divisors (26068590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21852738 is a wasteful number, since it uses less digits than its factorization.

21852738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14718 (or 14715 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 21852738 is about 4674.6912197492. The cubic root of 21852738 is about 279.5773299726.

The spelling of 21852738 in words is "twenty-one million, eight hundred fifty-two thousand, seven hundred thirty-eight".