20540744 has 32 divisors (see below), whose sum is σ = 44184000. Its totient is φ = 8769600.

The previous prime is 20540731. The next prime is 20540747. The reversal of 20540744 is 44704502.

It is not an unprimeable number, because it can be changed into a prime (20540747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19019 + ... + 20069.

It is an arithmetic number, because the mean of its divisors is an integer number (1380750).

Almost surely, 2^20540744 is an apocalyptic number.

It is an amenable number.

20540744 is an abundant number, since it is smaller than the sum of its proper divisors (23643256).

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

20540744 is a wasteful number, since it uses less digits than its factorization.

20540744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413 (or 1409 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 20540744 is about 4532.1897577220. The cubic root of 20540744 is about 273.8663812955.

The spelling of 20540744 in words is "twenty million, five hundred forty thousand, seven hundred forty-four".