21270749130 has 24 divisors (see below), whose sum is σ = 55303947972. Its totient is φ = 5672199744.

The previous prime is 21270749113. The next prime is 21270749167. The reversal of 21270749130 is 3194707212.

It can be written as a sum of positive squares in 2 ways, for example, as 21022970049 + 247779081 = 144993^2 + 15741^2 .

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 11 ways as a sum of consecutive naturals, for example, 118170739 + ... + 118170918.

Almost surely, 2^21270749130 is an apocalyptic number.

21270749130 is an abundant number, since it is smaller than the sum of its proper divisors (34033198842).

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

21270749130 is a wasteful number, since it uses less digits than its factorization.

21270749130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236341670 (or 236341667 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 21270749130 in words is "twenty-one billion, two hundred seventy million, seven hundred forty-nine thousand, one hundred thirty".