21055546562 has 8 divisors (see below), whose sum is σ = 32436923196. Its totient is φ = 10243238832.

The previous prime is 21055546529. The next prime is 21055546573. The reversal of 21055546562 is 26564555012.

It can be written as a sum of positive squares in 2 ways, for example, as 19485088921 + 1570457641 = 139589^2 + 39629^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142267133 + ... + 142267280.

Almost surely, 2^21055546562 is an apocalyptic number.

21055546562 is a deficient number, since it is larger than the sum of its proper divisors (11381376634).

21055546562 is a wasteful number, since it uses less digits than its factorization.

21055546562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284534452.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 21055546562 in words is "twenty-one billion, fifty-five million, five hundred forty-six thousand, five hundred sixty-two".