21232323210 has 64 divisors (see below), whose sum is σ = 58837669632. Its totient is φ = 4803065856.

The previous prime is 21232323197. The next prime is 21232323223. The reversal of 21232323210 is 1232323212.

It is a happy number.

21232323210 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (21232323197) and next prime (21232323223).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500797 + ... + 541536.

It is an arithmetic number, because the mean of its divisors is an integer number (919338588).

Almost surely, 2^21232323210 is an apocalyptic number.

21232323210 is an abundant number, since it is smaller than the sum of its proper divisors (37605346422).

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

21232323210 is a wasteful number, since it uses less digits than its factorization.

21232323210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042447.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21232323210 its reverse (1232323212), we get a palindrome (22464646422).

The spelling of 21232323210 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty-three thousand, two hundred ten".