20520492 has 24 divisors (see below), whose sum is σ = 48597696. Its totient is φ = 6737808.

The previous prime is 20520433. The next prime is 20520499. The reversal of 20520492 is 29402502.

It is not an unprimeable number, because it can be changed into a prime (20520499) 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, 11958 + ... + 13565.

It is an arithmetic number, because the mean of its divisors is an integer number (2024904).

Almost surely, 2^20520492 is an apocalyptic number.

It is an amenable number.

20520492 is an abundant number, since it is smaller than the sum of its proper divisors (28077204).

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

20520492 is a wasteful number, since it uses less digits than its factorization.

20520492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25597 (or 25595 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20520492 is about 4529.9549666636. The cubic root of 20520492 is about 273.7763461643.

Adding to 20520492 its reverse (29402502), we get a palindrome (49922994).

It can be divided in two parts, 20520 and 492, that added together give a palindrome (21012).

The spelling of 20520492 in words is "twenty million, five hundred twenty thousand, four hundred ninety-two".