21513330554 has 8 divisors (see below), whose sum is σ = 33673039200. Its totient is φ = 10288984156.

The previous prime is 21513330547. The next prime is 21513330593. The reversal of 21513330554 is 45503331512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21513330554.

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, 233840504 + ... + 233840595.

It is an arithmetic number, because the mean of its divisors is an integer number (4209129900).

Almost surely, 2^21513330554 is an apocalyptic number.

21513330554 is a deficient number, since it is larger than the sum of its proper divisors (12159708646).

21513330554 is a wasteful number, since it uses less digits than its factorization.

21513330554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467681124.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 21513330554 in words is "twenty-one billion, five hundred thirteen million, three hundred thirty thousand, five hundred fifty-four".