21031010324 has 6 divisors (see below), whose sum is σ = 36804268074. Its totient is φ = 10515505160.

The previous prime is 21031010281. The next prime is 21031010327. The reversal of 21031010324 is 42301013012.

It can be written as a sum of positive squares in only one way, i.e., 19457460100 + 1573550224 = 139490^2 + 39668^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031010327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628876287 + ... + 2628876294.

It is an arithmetic number, because the mean of its divisors is an integer number (6134044679).

Almost surely, 2^21031010324 is an apocalyptic number.

It is an amenable number.

21031010324 is a deficient number, since it is larger than the sum of its proper divisors (15773257750).

21031010324 is a wasteful number, since it uses less digits than its factorization.

21031010324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257752585 (or 5257752583 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21031010324 its reverse (42301013012), we get a palindrome (63332023336).

The spelling of 21031010324 in words is "twenty-one billion, thirty-one million, ten thousand, three hundred twenty-four".