21556250104 has 64 divisors (see below), whose sum is σ = 43208121600. Its totient is φ = 10046682624.

The previous prime is 21556250083. The next prime is 21556250129. The reversal of 21556250104 is 40105265512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9507579 + ... + 9509845.

It is an arithmetic number, because the mean of its divisors is an integer number (675126900).

Almost surely, 2^21556250104 is an apocalyptic number.

It is an amenable number.

21556250104 is an abundant number, since it is smaller than the sum of its proper divisors (21651871496).

21556250104 is a wasteful number, since it uses less digits than its factorization.

21556250104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 21556250104 in words is "twenty-one billion, five hundred fifty-six million, two hundred fifty thousand, one hundred four".