21262344406 has 8 divisors (see below), whose sum is σ = 32671407384. Its totient is φ = 10371875280.

The previous prime is 21262344373. The next prime is 21262344407. The reversal of 21262344406 is 60444326212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21262344407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129648360 + ... + 129648523.

It is an arithmetic number, because the mean of its divisors is an integer number (4083925923).

Almost surely, 2^21262344406 is an apocalyptic number.

21262344406 is a deficient number, since it is larger than the sum of its proper divisors (11409062978).

21262344406 is a wasteful number, since it uses less digits than its factorization.

21262344406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259296926.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 21262344406 in words is "twenty-one billion, two hundred sixty-two million, three hundred forty-four thousand, four hundred six".