20115520455142 has 16 divisors (see below), whose sum is σ = 36512205196320. Its totient is φ = 8113823376768.

The previous prime is 20115520455131. The next prime is 20115520455143. The reversal of 20115520455142 is 24155402551102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115520455143) 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, 42259496517 + ... + 42259496992.

It is an arithmetic number, because the mean of its divisors is an integer number (2282012824770).

Almost surely, 2^{20115520455142} is an apocalyptic number.

20115520455142 is a deficient number, since it is larger than the sum of its proper divisors (16396684741178).

20115520455142 is a wasteful number, since it uses less digits than its factorization.

20115520455142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84518993535.

The product of its (nonzero) digits is 80000, while the sum is 37.

The spelling of 20115520455142 in words is "twenty trillion, one hundred fifteen billion, five hundred twenty million, four hundred fifty-five thousand, one hundred forty-two".