21427346946760 has 16 divisors (see below), whose sum is σ = 48211530630300. Its totient is φ = 8570938778688.

The previous prime is 21427346946737. The next prime is 21427346946769. The reversal of 21427346946760 is 6764964372412.

It can be written as a sum of positive squares in 2 ways, for example, as 19545187948036 + 1882158998724 = 4420994^2 + 1371918^2 .

It is not an unprimeable number, because it can be changed into a prime (21427346946769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267841836795 + ... + 267841836874.

Almost surely, 2^{21427346946760} is an apocalyptic number.

21427346946760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21427346946760 is an abundant number, since it is smaller than the sum of its proper divisors (26784183683540).

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

21427346946760 is a wasteful number, since it uses less digits than its factorization.

21427346946760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535683673680 (or 535683673676 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 61.

The spelling of 21427346946760 in words is "twenty-one trillion, four hundred twenty-seven billion, three hundred forty-six million, nine hundred forty-six thousand, seven hundred sixty".