21850874 has 24 divisors (see below), whose sum is σ = 36099840. Its totient is φ = 9891288.

The previous prime is 21850867. The next prime is 21850883. The reversal of 21850874 is 47805812.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19559 + ... + 20645.

It is an arithmetic number, because the mean of its divisors is an integer number (1504160).

Almost surely, 2^21850874 is an apocalyptic number.

21850874 is a deficient number, since it is larger than the sum of its proper divisors (14248966).

21850874 is a wasteful number, since it uses less digits than its factorization.

21850874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 21850874 is about 4674.4918440404. The cubic root of 21850874 is about 279.5693805955.

It can be divided in two parts, 21850 and 874, that multiplied together give a square (19096900 = 4370²).

The spelling of 21850874 in words is "twenty-one million, eight hundred fifty thousand, eight hundred seventy-four".