21155164246060 has 48 divisors (see below), whose sum is σ = 47905110965376. Its totient is φ = 7801032529152.

The previous prime is 21155164246057. The next prime is 21155164246061. The reversal of 21155164246060 is 6064246155112.

It is a junction number, because it is equal to n+sod(n) for n = 21155164245998 and 21155164246016.

It is not an unprimeable number, because it can be changed into a prime (21155164246061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52429044 + ... + 52831003.

It is an arithmetic number, because the mean of its divisors is an integer number (998023145112).

Almost surely, 2^{21155164246060} is an apocalyptic number.

21155164246060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21155164246060 is an abundant number, since it is smaller than the sum of its proper divisors (26749946719316).

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

21155164246060 is a wasteful number, since it uses less digits than its factorization.

21155164246060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105260842 (or 105260840 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 21155164246060 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred sixty-four million, two hundred forty-six thousand, sixty".