20520542 has 16 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 8776248.

The previous prime is 20520527. The next prime is 20520553. The reversal of 20520542 is 24502502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7163 + ... + 9609.

It is an arithmetic number, because the mean of its divisors is an integer number (2203200).

Almost surely, 2^20520542 is an apocalyptic number.

20520542 is a deficient number, since it is larger than the sum of its proper divisors (14730658).

20520542 is a wasteful number, since it uses less digits than its factorization.

20520542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20520542 is about 4529.9604854789. The cubic root of 20520542 is about 273.7765685242.

The spelling of 20520542 in words is "twenty million, five hundred twenty thousand, five hundred forty-two".