20407712 has 24 divisors (see below), whose sum is σ = 43269156. Its totient is φ = 9418752.

The previous prime is 20407711. The next prime is 20407721. The reversal of 20407712 is 21770402.

It can be written as a sum of positive squares in 2 ways, for example, as 20394256 + 13456 = 4516^2 + 116^2 .

It is not an unprimeable number, because it can be changed into a prime (20407711) 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, 24113 + ... + 24944.

Almost surely, 2^20407712 is an apocalyptic number.

It is an amenable number.

20407712 is an abundant number, since it is smaller than the sum of its proper divisors (22861444).

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

20407712 is a wasteful number, since it uses less digits than its factorization.

20407712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49080 (or 49072 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20407712 is about 4517.4895683333. The cubic root of 20407712 is about 273.2738690129.

The spelling of 20407712 in words is "twenty million, four hundred seven thousand, seven hundred twelve".