21354747141160 has 16 divisors (see below), whose sum is σ = 48048181067700. Its totient is φ = 8541898856448.

The previous prime is 21354747141149. The next prime is 21354747141187. The reversal of 21354747141160 is 6114174745312.

It can be written as a sum of positive squares in 2 ways, for example, as 19950176099844 + 1404571041316 = 4466562^2 + 1185146^2 .

It is a super-2 number, since 2×21354747141160² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21354747141160.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266934339225 + ... + 266934339304.

Almost surely, 2^{21354747141160} is an apocalyptic number.

21354747141160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21354747141160 is an abundant number, since it is smaller than the sum of its proper divisors (26693433926540).

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

21354747141160 is a wasteful number, since it uses less digits than its factorization.

21354747141160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533868678540 (or 533868678536 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 21354747141160 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-seven million, one hundred forty-one thousand, one hundred sixty".