20499474 has 8 divisors (see below), whose sum is σ = 40998960. Its totient is φ = 6833156.

The previous prime is 20499449. The next prime is 20499481. The reversal of 20499474 is 47499402.

It is a happy number.

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

20499474 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708284 + ... + 1708295.

It is an arithmetic number, because the mean of its divisors is an integer number (5124870).

Almost surely, 2^20499474 is an apocalyptic number.

20499474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20499474 is a wasteful number, since it uses less digits than its factorization.

20499474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416584.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20499474 is about 4527.6344817134. The cubic root of 20499474 is about 273.6828429328.

The spelling of 20499474 in words is "twenty million, four hundred ninety-nine thousand, four hundred seventy-four".