21275139362 has 16 divisors (see below), whose sum is σ = 33817849272. Its totient is φ = 10003557120.

The previous prime is 21275139349. The next prime is 21275139367. The reversal of 21275139362 is 26393157212.

It can be written as a sum of positive squares in 4 ways, for example, as 17990588641 + 3284550721 = 134129^2 + 57311^2 .

It is not an unprimeable number, because it can be changed into a prime (21275139367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216689 + ... + 299172.

Almost surely, 2^21275139362 is an apocalyptic number.

21275139362 is a deficient number, since it is larger than the sum of its proper divisors (12542709910).

21275139362 is a wasteful number, since it uses less digits than its factorization.

21275139362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517093.

The product of its digits is 136080, while the sum is 41.

The spelling of 21275139362 in words is "twenty-one billion, two hundred seventy-five million, one hundred thirty-nine thousand, three hundred sixty-two".