20988030553590 has 32 divisors (see below), whose sum is σ = 50535349159680. Its totient is φ = 5578577499744.

The previous prime is 20988030553531. The next prime is 20988030553591. The reversal of 20988030553590 is 9535503088902.

It is a self number, because there is not a number n which added to its sum of digits gives 20988030553590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988030553591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1139406130 + ... + 1139424549.

It is an arithmetic number, because the mean of its divisors is an integer number (1579229661240).

Almost surely, 2^{20988030553590} is an apocalyptic number.

20988030553590 is an abundant number, since it is smaller than the sum of its proper divisors (29547318606090).

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

20988030553590 is a wasteful number, since it uses less digits than its factorization.

20988030553590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278830996.

The product of its (nonzero) digits is 11664000, while the sum is 57.

The spelling of 20988030553590 in words is "twenty trillion, nine hundred eighty-eight billion, thirty million, five hundred fifty-three thousand, five hundred ninety".