20474912 has 24 divisors (see below), whose sum is σ = 41401836. Its totient is φ = 9960192.

The previous prime is 20474903. The next prime is 20474917. The reversal of 20474912 is 21947402.

It can be written as a sum of positive squares in 2 ways, for example, as 20394256 + 80656 = 4516^2 + 284^2 .

It is not an unprimeable number, because it can be changed into a prime (20474917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7463 + ... + 9830.

Almost surely, 2^20474912 is an apocalyptic number.

It is an amenable number.

20474912 is an abundant number, since it is smaller than the sum of its proper divisors (20926924).

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

20474912 is a wasteful number, since it uses less digits than its factorization.

20474912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17340 (or 17332 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20474912 is about 4524.9212147837. The cubic root of 20474912 is about 273.5734924104.

The spelling of 20474912 in words is "twenty million, four hundred seventy-four thousand, nine hundred twelve".