20540492 has 24 divisors (see below), whose sum is σ = 41185536. Its totient is φ = 8780688.

The previous prime is 20540491. The next prime is 20540503. The reversal of 20540492 is 29404502.

It is not an unprimeable number, because it can be changed into a prime (20540491) 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, 15113 + ... + 16415.

It is an arithmetic number, because the mean of its divisors is an integer number (1716064).

Almost surely, 2^20540492 is an apocalyptic number.

It is an amenable number.

20540492 is an abundant number, since it is smaller than the sum of its proper divisors (20645044).

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

20540492 is a wasteful number, since it uses less digits than its factorization.

20540492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20540492 is about 4532.1619565060. The cubic root of 20540492 is about 273.8652613327.

Adding to 20540492 its reverse (29404502), we get a palindrome (49944994).

The spelling of 20540492 in words is "twenty million, five hundred forty thousand, four hundred ninety-two".