21323402334 has 32 divisors (see below), whose sum is σ = 51030366240. Its totient is φ = 6561046656.

The previous prime is 21323402333. The next prime is 21323402351. The reversal of 21323402334 is 43320432312.

21323402334 is a `hidden beast` number, since 2 + 1 + 323 + 4 + 0 + 2 + 334 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21323402298 and 21323402307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323402333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15186907 + ... + 15188310.

It is an arithmetic number, because the mean of its divisors is an integer number (1594698945).

Almost surely, 2^21323402334 is an apocalyptic number.

21323402334 is an abundant number, since it is smaller than the sum of its proper divisors (29706963906).

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

21323402334 is a wasteful number, since it uses less digits than its factorization.

21323402334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30375241 (or 30375235 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21323402334 its reverse (43320432312), we get a palindrome (64643834646).

The spelling of 21323402334 in words is "twenty-one billion, three hundred twenty-three million, four hundred two thousand, three hundred thirty-four".