20231323400 has 96 divisors (see below), whose sum is σ = 47392684680. Its totient is φ = 8031744000.

The previous prime is 20231323391. The next prime is 20231323403. The reversal of 20231323400 is 432313202.

It can be written as a sum of positive squares in 12 ways, for example, as 1017482404 + 19213840996 = 31898^2 + 138614^2 .

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 (20231323403) 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, 20291702 + ... + 20292698.

Almost surely, 2^20231323400 is an apocalyptic number.

20231323400 is a gapful number since it is divisible by the number (20) 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 20231323400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23696342340).

20231323400 is an abundant number, since it is smaller than the sum of its proper divisors (27161361280).

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

20231323400 is a wasteful number, since it uses less digits than its factorization.

20231323400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1666 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20231323400 its reverse (432313202), we get a palindrome (20663636602).

The spelling of 20231323400 in words is "twenty billion, two hundred thirty-one million, three hundred twenty-three thousand, four hundred".