21275089316 has 24 divisors (see below), whose sum is σ = 40752667704. Its totient is φ = 9658298880.

The previous prime is 21275089259. The next prime is 21275089321. The reversal of 21275089316 is 61398057212.

It can be written as a sum of positive squares in 4 ways, for example, as 1308268900 + 19966820416 = 36170^2 + 141304^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350405 + ... + 3356748.

It is an arithmetic number, because the mean of its divisors is an integer number (1698027821).

Almost surely, 2^21275089316 is an apocalyptic number.

21275089316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21275089316 is a deficient number, since it is larger than the sum of its proper divisors (19477578388).

21275089316 is a wasteful number, since it uses less digits than its factorization.

21275089316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707231 (or 6707229 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 21275089316 in words is "twenty-one billion, two hundred seventy-five million, eighty-nine thousand, three hundred sixteen".