21045823334 has 16 divisors (see below), whose sum is σ = 32846098320. Its totient is φ = 10101319200.

The previous prime is 21045823313. The next prime is 21045823397. The reversal of 21045823334 is 43332854012.

It is a junction number, because it is equal to n+sod(n) for n = 21045823294 and 21045823303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038692 + ... + 1058759.

It is an arithmetic number, because the mean of its divisors is an integer number (2052881145).

Almost surely, 2^21045823334 is an apocalyptic number.

21045823334 is a deficient number, since it is larger than the sum of its proper divisors (11800274986).

21045823334 is a wasteful number, since it uses less digits than its factorization.

21045823334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097655.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 21045823334 in words is "twenty-one billion, forty-five million, eight hundred twenty-three thousand, three hundred thirty-four".