21341344854 has 16 divisors (see below), whose sum is σ = 42874094592. Its totient is φ = 7081880808.

The previous prime is 21341344853. The next prime is 21341344891. The reversal of 21341344854 is 45844314312.

21341344854 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341344853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7973754 + ... + 7976429.

It is an arithmetic number, because the mean of its divisors is an integer number (2679630912).

Almost surely, 2^21341344854 is an apocalyptic number.

21341344854 is an abundant number, since it is smaller than the sum of its proper divisors (21532749738).

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

21341344854 is a wasteful number, since it uses less digits than its factorization.

21341344854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15950411.

The product of its digits is 184320, while the sum is 39.

The spelling of 21341344854 in words is "twenty-one billion, three hundred forty-one million, three hundred forty-four thousand, eight hundred fifty-four".