21324131024 has 20 divisors (see below), whose sum is σ = 47217718944. Its totient is φ = 9138913248.

The previous prime is 21324131021. The next prime is 21324131041. The reversal of 21324131024 is 42013142312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324131021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95196902 + ... + 95197125.

Almost surely, 2^21324131024 is an apocalyptic number.

It is an amenable number.

21324131024 is an abundant number, since it is smaller than the sum of its proper divisors (25893587920).

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

21324131024 is a wasteful number, since it uses less digits than its factorization.

21324131024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190394042 (or 190394036 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21324131024 its reverse (42013142312), we get a palindrome (63337273336).

The spelling of 21324131024 in words is "twenty-one billion, three hundred twenty-four million, one hundred thirty-one thousand, twenty-four".