20542244430 has 32 divisors (see below), whose sum is σ = 49661260704. Its totient is φ = 5437945856.

The previous prime is 20542244417. The next prime is 20542244447. The reversal of 20542244430 is 3444224502.

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 15 ways as a sum of consecutive naturals, for example, 2494947 + ... + 2503166.

It is an arithmetic number, because the mean of its divisors is an integer number (1551914397).

Almost surely, 2^20542244430 is an apocalyptic number.

20542244430 is an abundant number, since it is smaller than the sum of its proper divisors (29119016274).

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

20542244430 is a wasteful number, since it uses less digits than its factorization.

20542244430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998260.

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

Adding to 20542244430 its reverse (3444224502), we get a palindrome (23986468932).

The spelling of 20542244430 in words is "twenty billion, five hundred forty-two million, two hundred forty-four thousand, four hundred thirty".