21484974 has 32 divisors (see below), whose sum is σ = 51998976. Its totient is φ = 5777280.

The previous prime is 21484973. The next prime is 21484987. The reversal of 21484974 is 47948412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14332 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (1624968).

Almost surely, 2^21484974 is an apocalyptic number.

21484974 is an abundant number, since it is smaller than the sum of its proper divisors (30514002).

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

21484974 is a wasteful number, since it uses less digits than its factorization.

21484974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30120.

The product of its digits is 64512, while the sum is 39.

The square root of 21484974 is about 4635.1886692992. The cubic root of 21484974 is about 278.0000948881. Note that the first 4 decimals are identical.

The spelling of 21484974 in words is "twenty-one million, four hundred eighty-four thousand, nine hundred seventy-four".