21004543102 has 16 divisors (see below), whose sum is σ = 32106944592. Its totient is φ = 10302298240.

The previous prime is 21004543099. The next prime is 21004543127. The reversal of 21004543102 is 20134540012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740913 + ... + 768739.

It is an arithmetic number, because the mean of its divisors is an integer number (2006684037).

Almost surely, 2^21004543102 is an apocalyptic number.

21004543102 is a deficient number, since it is larger than the sum of its proper divisors (11102401490).

21004543102 is a wasteful number, since it uses less digits than its factorization.

21004543102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35003.

The product of its (nonzero) digits is 960, while the sum is 22.

The spelling of 21004543102 in words is "twenty-one billion, four million, five hundred forty-three thousand, one hundred two".