21213314232 has 64 divisors (see below), whose sum is σ = 57874296960. Its totient is φ = 6426076800.

The previous prime is 21213314209. The next prime is 21213314251. The reversal of 21213314232 is 23241331212.

It is a super-3 number, since 3×21213314232³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 865182 + ... + 889362.

It is an arithmetic number, because the mean of its divisors is an integer number (904285890).

Almost surely, 2^21213314232 is an apocalyptic number.

21213314232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21213314232 is an abundant number, since it is smaller than the sum of its proper divisors (36660982728).

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

21213314232 is a wasteful number, since it uses less digits than its factorization.

21213314232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27524 (or 27520 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 21213314232 its reverse (23241331212), we get a palindrome (44454645444).

The spelling of 21213314232 in words is "twenty-one billion, two hundred thirteen million, three hundred fourteen thousand, two hundred thirty-two".