21455111310162 has 64 divisors (see below), whose sum is σ = 45463680259200. Its totient is φ = 6726672195584.

The previous prime is 21455111310161. The next prime is 21455111310221. The reversal of 21455111310162 is 26101311155412.

It is not an unprimeable number, because it can be changed into a prime (21455111310161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1169015578 + ... + 1169033930.

It is an arithmetic number, because the mean of its divisors is an integer number (710370004050).

Almost surely, 2^{21455111310162} is an apocalyptic number.

21455111310162 is an abundant number, since it is smaller than the sum of its proper divisors (24008568949038).

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

21455111310162 is a wasteful number, since it uses less digits than its factorization.

21455111310162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25147.

The product of its (nonzero) digits is 7200, while the sum is 33.

Adding to 21455111310162 its reverse (26101311155412), we get a palindrome (47556422465574).

The spelling of 21455111310162 in words is "twenty-one trillion, four hundred fifty-five billion, one hundred eleven million, three hundred ten thousand, one hundred sixty-two".