21375055342160 has 160 divisors (see below), whose sum is σ = 54271196754432. Its totient is φ = 7782131220480.

The previous prime is 21375055342087. The next prime is 21375055342163. The reversal of 21375055342160 is 6124355057312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375055342163) 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, 26947547 + ... + 27729413.

Almost surely, 2^{21375055342160} is an apocalyptic number.

21375055342160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21375055342160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27135598377216).

21375055342160 is an abundant number, since it is smaller than the sum of its proper divisors (32896141412272).

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

21375055342160 is a wasteful number, since it uses less digits than its factorization.

21375055342160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782261 (or 782255 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 21375055342160 in words is "twenty-one trillion, three hundred seventy-five billion, fifty-five million, three hundred forty-two thousand, one hundred sixty".