21323102010 has 64 divisors (see below), whose sum is σ = 58536843264. Its totient is φ = 4869633600.

The previous prime is 21323101997. The next prime is 21323102011. The reversal of 21323102010 is 1020132312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21323102011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202555 + ... + 289265.

It is an arithmetic number, because the mean of its divisors is an integer number (914638176).

Almost surely, 2^21323102010 is an apocalyptic number.

21323102010 is an abundant number, since it is smaller than the sum of its proper divisors (37213741254).

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

21323102010 is a wasteful number, since it uses less digits than its factorization.

21323102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87899.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21323102010 its reverse (1020132312), we get a palindrome (22343234322).

The spelling of 21323102010 in words is "twenty-one billion, three hundred twenty-three million, one hundred two thousand, ten".