20213974 has 16 divisors (see below), whose sum is σ = 33177600. Its totient is φ = 9160360.

The previous prime is 20213959. The next prime is 20213981. The reversal of 20213974 is 47931202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7227 + ... + 9625.

It is an arithmetic number, because the mean of its divisors is an integer number (2073600).

Almost surely, 2^20213974 is an apocalyptic number.

20213974 is a deficient number, since it is larger than the sum of its proper divisors (12963626).

20213974 is a wasteful number, since it uses less digits than its factorization.

20213974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20213974 is about 4495.9953291791. The cubic root of 20213974 is about 272.4063544899.

It can be divided in two parts, 2021 and 3974, that added together give a palindrome (5995).

The spelling of 20213974 in words is "twenty million, two hundred thirteen thousand, nine hundred seventy-four".