21344525334 has 96 divisors (see below), whose sum is σ = 51651688608. Its totient is φ = 6315840000.

The previous prime is 21344525327. The next prime is 21344525353. The reversal of 21344525334 is 43352544312.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1452544 + ... + 1467164.

It is an arithmetic number, because the mean of its divisors is an integer number (538038423).

Almost surely, 2^21344525334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21344525334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25825844304).

21344525334 is an abundant number, since it is smaller than the sum of its proper divisors (30307163274).

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

21344525334 is a wasteful number, since it uses less digits than its factorization.

21344525334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14814 (or 14811 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

The spelling of 21344525334 in words is "twenty-one billion, three hundred forty-four million, five hundred twenty-five thousand, three hundred thirty-four".