21461327047 has 16 divisors (see below), whose sum is σ = 22401308160. Its totient is φ = 20542328352.

The previous prime is 21461327039. The next prime is 21461327053. The reversal of 21461327047 is 74072316412.

It is a cyclic number.

It is not a de Polignac number, because 21461327047 - 2³ = 21461327039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21461326997 and 21461327015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461327647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2089278 + ... + 2099524.

It is an arithmetic number, because the mean of its divisors is an integer number (1400081760).

Almost surely, 2^21461327047 is an apocalyptic number.

21461327047 is a deficient number, since it is larger than the sum of its proper divisors (939981113).

21461327047 is a wasteful number, since it uses less digits than its factorization.

21461327047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11262.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 21461327047 in words is "twenty-one billion, four hundred sixty-one million, three hundred twenty-seven thousand, forty-seven".