20542253144 has 96 divisors (see below), whose sum is σ = 48091780080. Its totient is φ = 8172251136.

The previous prime is 20542253129. The next prime is 20542253177. The reversal of 20542253144 is 44135224502.

It is a self number, because there is not a number n which added to its sum of digits gives 20542253144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 465359 + ... + 507585.

Almost surely, 2^20542253144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20542253144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24045890040).

20542253144 is an abundant number, since it is smaller than the sum of its proper divisors (27549526936).

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

20542253144 is a wasteful number, since it uses less digits than its factorization.

20542253144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42337 (or 42326 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 20542253144 its reverse (44135224502), we get a palindrome (64677477646).

The spelling of 20542253144 in words is "twenty billion, five hundred forty-two million, two hundred fifty-three thousand, one hundred forty-four".