21799454316 has 12 divisors (see below), whose sum is σ = 50865393432. Its totient is φ = 7266484768.

The previous prime is 21799454291. The next prime is 21799454333. The reversal of 21799454316 is 61345499712.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908310585 + ... + 908310608.

It is an arithmetic number, because the mean of its divisors is an integer number (4238782786).

Almost surely, 2^21799454316 is an apocalyptic number.

It is an amenable number.

21799454316 is an abundant number, since it is smaller than the sum of its proper divisors (29065939116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21799454316 is a wasteful number, since it uses less digits than its factorization.

21799454316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816621200 (or 1816621198 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The spelling of 21799454316 in words is "twenty-one billion, seven hundred ninety-nine million, four hundred fifty-four thousand, three hundred sixteen".