21214025054660 has 96 divisors (see below), whose sum is σ = 47988434479104. Its totient is φ = 7854435072000.

The previous prime is 21214025054659. The next prime is 21214025054671. The reversal of 21214025054660 is 6645052041212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 546438050 + ... + 546476870.

It is an arithmetic number, because the mean of its divisors is an integer number (499879525824).

Almost surely, 2^{21214025054660} is an apocalyptic number.

21214025054660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214025054660 is an abundant number, since it is smaller than the sum of its proper divisors (26774409424444).

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

21214025054660 is a wasteful number, since it uses less digits than its factorization.

21214025054660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77205 (or 77203 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 21214025054660 its reverse (6645052041212), we get a palindrome (27859077095872).

The spelling of 21214025054660 in words is "twenty-one trillion, two hundred fourteen billion, twenty-five million, fifty-four thousand, six hundred sixty".