21544893102 has 32 divisors (see below), whose sum is σ = 43398986400. Its totient is φ = 7130142720.

The previous prime is 21544893047. The next prime is 21544893119. The reversal of 21544893102 is 20139844512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2635902 + ... + 2644062.

It is an arithmetic number, because the mean of its divisors is an integer number (1356218325).

Almost surely, 2^21544893102 is an apocalyptic number.

21544893102 is an abundant number, since it is smaller than the sum of its proper divisors (21854093298).

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

21544893102 is a wasteful number, since it uses less digits than its factorization.

21544893102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11268.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 21544893102 in words is "twenty-one billion, five hundred forty-four million, eight hundred ninety-three thousand, one hundred two".