21232451324 has 24 divisors (see below), whose sum is σ = 42485425248. Its totient is φ = 9095224320.

The previous prime is 21232451269. The next prime is 21232451329. The reversal of 21232451324 is 42315423212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232451329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123929 + ... + 240464.

It is an arithmetic number, because the mean of its divisors is an integer number (1770226052).

Almost surely, 2^21232451324 is an apocalyptic number.

It is an amenable number.

21232451324 is an abundant number, since it is smaller than the sum of its proper divisors (21252973924).

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

21232451324 is a wasteful number, since it uses less digits than its factorization.

21232451324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366485 (or 366483 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

Adding to 21232451324 its reverse (42315423212), we get a palindrome (63547874536).

The spelling of 21232451324 in words is "twenty-one billion, two hundred thirty-two million, four hundred fifty-one thousand, three hundred twenty-four".