20520042 has 16 divisors (see below), whose sum is σ = 41085792. Its totient is φ = 6832400.

The previous prime is 20520041. The next prime is 20520043. The reversal of 20520042 is 24002502.

It is an interprime number because it is at equal distance from previous prime (20520041) and next prime (20520043).

It is not an unprimeable number, because it can be changed into a prime (20520041) 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, 7528 + ... + 9884.

It is an arithmetic number, because the mean of its divisors is an integer number (2567862).

Almost surely, 2^20520042 is an apocalyptic number.

20520042 is an abundant number, since it is smaller than the sum of its proper divisors (20565750).

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

20520042 is a wasteful number, since it uses less digits than its factorization.

20520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20520042 is about 4529.9052970233. The cubic root of 20520042 is about 273.7743449086.

Adding to 20520042 its reverse (24002502), we get a palindrome (44522544).

The spelling of 20520042 in words is "twenty million, five hundred twenty thousand, forty-two".