21862474 has 8 divisors (see below), whose sum is σ = 32941440. Its totient is φ = 10881996.

The previous prime is 21862453. The next prime is 21862481. The reversal of 21862474 is 47426812.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 24064 + ... + 24955.

It is an arithmetic number, because the mean of its divisors is an integer number (4117680).

Almost surely, 2^21862474 is an apocalyptic number.

21862474 is a deficient number, since it is larger than the sum of its proper divisors (11078966).

21862474 is a wasteful number, since it uses less digits than its factorization.

21862474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49244.

The product of its digits is 21504, while the sum is 34.

The square root of 21862474 is about 4675.7324559902. The cubic root of 21862474 is about 279.6188436225.

The spelling of 21862474 in words is "twenty-one million, eight hundred sixty-two thousand, four hundred seventy-four".