20123131302 has 24 divisors (see below), whose sum is σ = 46164831336. Its totient is φ = 6313139136.

The previous prime is 20123131289. The next prime is 20123131367. The reversal of 20123131302 is 20313132102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32880628 + ... + 32881239.

It is an arithmetic number, because the mean of its divisors is an integer number (1923534639).

Almost surely, 2^20123131302 is an apocalyptic number.

20123131302 is an abundant number, since it is smaller than the sum of its proper divisors (26041700034).

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

20123131302 is a wasteful number, since it uses less digits than its factorization.

20123131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65761892 (or 65761889 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20123131302 its reverse (20313132102), we get a palindrome (40436263404).

The spelling of 20123131302 in words is "twenty billion, one hundred twenty-three million, one hundred thirty-one thousand, three hundred two".