21274547330 has 16 divisors (see below), whose sum is σ = 38453086584. Its totient is φ = 8474507520.

The previous prime is 21274547299. The next prime is 21274547339. The reversal of 21274547330 is 3374547212.

It can be written as a sum of positive squares in 4 ways, for example, as 17096347009 + 4178200321 = 130753^2 + 64639^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21274547339) 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, 4411397 + ... + 4416216.

Almost surely, 2^21274547330 is an apocalyptic number.

21274547330 is a deficient number, since it is larger than the sum of its proper divisors (17178539254).

21274547330 is a wasteful number, since it uses less digits than its factorization.

21274547330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8827861.

The product of its (nonzero) digits is 141120, while the sum is 38.

The spelling of 21274547330 in words is "twenty-one billion, two hundred seventy-four million, five hundred forty-seven thousand, three hundred thirty".