21270315274 has 16 divisors (see below), whose sum is σ = 34549580520. Its totient is φ = 9762828480.

The previous prime is 21270315239. The next prime is 21270315299. The reversal of 21270315274 is 47251307212.

It can be written as a sum of positive squares in 4 ways, for example, as 12942475225 + 8327840049 = 113765^2 + 91257^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255209 + ... + 2264620.

Almost surely, 2^21270315274 is an apocalyptic number.

21270315274 is a deficient number, since it is larger than the sum of its proper divisors (13279265246).

21270315274 is a wasteful number, since it uses less digits than its factorization.

21270315274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520025.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 21270315274 in words is "twenty-one billion, two hundred seventy million, three hundred fifteen thousand, two hundred seventy-four".