10312123340 has 72 divisors (see below), whose sum is σ = 23152601472. Its totient is φ = 3853946880.

The previous prime is 10312123321. The next prime is 10312123343. The reversal of 10312123340 is 4332121301.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (10312123343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 511532 + ... + 531308.

Almost surely, 2^10312123340 is an apocalyptic number.

10312123340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10312123340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11576300736).

10312123340 is an abundant number, since it is smaller than the sum of its proper divisors (12840478132).

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

10312123340 is a wasteful number, since it uses less digits than its factorization.

10312123340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19875 (or 19844 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 10312123340 its reverse (4332121301), we get a palindrome (14644244641).

The spelling of 10312123340 in words is "ten billion, three hundred twelve million, one hundred twenty-three thousand, three hundred forty".