20448738 has 12 divisors (see below), whose sum is σ = 44305638. Its totient is φ = 6816240.

The previous prime is 20448737. The next prime is 20448749. The reversal of 20448738 is 83784402.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 974169 = 4413^2 + 987^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20448733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568003 + ... + 568038.

Almost surely, 2^20448738 is an apocalyptic number.

20448738 is an abundant number, since it is smaller than the sum of its proper divisors (23856900).

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

20448738 is a wasteful number, since it uses less digits than its factorization.

20448738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136049 (or 1136046 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 20448738 is about 4522.0280848310. The cubic root of 20448738 is about 273.4568689387.

The spelling of 20448738 in words is "twenty million, four hundred forty-eight thousand, seven hundred thirty-eight".