20123210310 has 32 divisors (see below), whose sum is σ = 55195091712. Its totient is φ = 4599590880.

The previous prime is 20123210309. The next prime is 20123210323. The reversal of 20123210310 is 1301232102.

It is a super-2 number, since 2×20123210310² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20123210310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47912196 + ... + 47912615.

It is an arithmetic number, because the mean of its divisors is an integer number (1724846616).

Almost surely, 2^20123210310 is an apocalyptic number.

20123210310 is an abundant number, since it is smaller than the sum of its proper divisors (35071881402).

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

20123210310 is a wasteful number, since it uses less digits than its factorization.

20123210310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95824828.

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

Adding to 20123210310 its reverse (1301232102), we get a palindrome (21424442412).

The spelling of 20123210310 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, three hundred ten".