21233133340 has 12 divisors (see below), whose sum is σ = 44589580056. Its totient is φ = 8493253328.

The previous prime is 21233133323. The next prime is 21233133373. The reversal of 21233133340 is 4333133212.

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, 530828314 + ... + 530828353.

It is an arithmetic number, because the mean of its divisors is an integer number (3715798338).

Almost surely, 2^21233133340 is an apocalyptic number.

21233133340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233133340 is an abundant number, since it is smaller than the sum of its proper divisors (23356446716).

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

21233133340 is a wasteful number, since it uses less digits than its factorization.

21233133340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061656676 (or 1061656674 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21233133340 its reverse (4333133212), we get a palindrome (25566266552).

The spelling of 21233133340 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirty-three thousand, three hundred forty".