21233045564 has 12 divisors (see below), whose sum is σ = 37363122888. Its totient is φ = 10557867600.

The previous prime is 21233045531. The next prime is 21233045597. The reversal of 21233045564 is 46554033212.

It is an interprime number because it is at equal distance from previous prime (21233045531) and next prime (21233045597).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14662982 + ... + 14664429.

It is an arithmetic number, because the mean of its divisors is an integer number (3113593574).

Almost surely, 2^21233045564 is an apocalyptic number.

It is an amenable number.

21233045564 is a deficient number, since it is larger than the sum of its proper divisors (16130077324).

21233045564 is a wasteful number, since it uses less digits than its factorization.

21233045564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29327596 (or 29327594 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21233045564 its reverse (46554033212), we get a palindrome (67787078776).

The spelling of 21233045564 in words is "twenty-one billion, two hundred thirty-three million, forty-five thousand, five hundred sixty-four".