21300879474 has 96 divisors (see below), whose sum is σ = 55120440960. Its totient is φ = 6079673376.

The previous prime is 21300879473. The next prime is 21300879529. The reversal of 21300879474 is 47497800312.

It is not an unprimeable number, because it can be changed into a prime (21300879473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2951979 + ... + 2959185.

It is an arithmetic number, because the mean of its divisors is an integer number (574171260).

Almost surely, 2^21300879474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21300879474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27560220480).

21300879474 is an abundant number, since it is smaller than the sum of its proper divisors (33819561486).

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

21300879474 is a wasteful number, since it uses less digits than its factorization.

21300879474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8349 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 21300879474 in words is "twenty-one billion, three hundred million, eight hundred seventy-nine thousand, four hundred seventy-four".