21323034 has 32 divisors (see below), whose sum is σ = 48545280. Its totient is φ = 6933600.

The previous prime is 21323021. The next prime is 21323053. The reversal of 21323034 is 43032312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21322998 and 21323016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2602 + ... + 7029.

It is an arithmetic number, because the mean of its divisors is an integer number (1517040).

Almost surely, 2^21323034 is an apocalyptic number.

21323034 is an abundant number, since it is smaller than the sum of its proper divisors (27222246).

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

21323034 is a wasteful number, since it uses less digits than its factorization.

21323034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9683 (or 9677 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 21323034 is about 4617.6870833784. The cubic root of 21323034 is about 277.2998703128.

Adding to 21323034 its reverse (43032312), we get a palindrome (64355346).

The spelling of 21323034 in words is "twenty-one million, three hundred twenty-three thousand, thirty-four".