20524442430 has 64 divisors (see below), whose sum is σ = 49916543040. Its totient is φ = 5400428544.

The previous prime is 20524442413. The next prime is 20524442453. The reversal of 20524442430 is 3424442502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970206 + ... + 991134.

It is an arithmetic number, because the mean of its divisors is an integer number (779945985).

Almost surely, 2^20524442430 is an apocalyptic number.

20524442430 is an abundant number, since it is smaller than the sum of its proper divisors (29392100610).

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

20524442430 is a wasteful number, since it uses less digits than its factorization.

20524442430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21373.

The product of its (nonzero) digits is 30720, while the sum is 30.

Adding to 20524442430 its reverse (3424442502), we get a palindrome (23948884932).

The spelling of 20524442430 in words is "twenty billion, five hundred twenty-four million, four hundred forty-two thousand, four hundred thirty".