21458900286 has 48 divisors (see below), whose sum is σ = 47906883024. Its totient is φ = 6936907392.

The previous prime is 21458900237. The next prime is 21458900297. The reversal of 21458900286 is 68200985412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151986 + ... + 256938.

It is an arithmetic number, because the mean of its divisors is an integer number (998060063).

Almost surely, 2^21458900286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21458900286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23953441512).

21458900286 is an abundant number, since it is smaller than the sum of its proper divisors (26447982738).

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

21458900286 is a wasteful number, since it uses less digits than its factorization.

21458900286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105305 (or 105302 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 21458900286 in words is "twenty-one billion, four hundred fifty-eight million, nine hundred thousand, two hundred eighty-six".