23123022040 has 64 divisors (see below), whose sum is σ = 54855496800. Its totient is φ = 8747937792.

The previous prime is 23123022029. The next prime is 23123022049. The reversal of 23123022040 is 4022032132.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 23123021999 and 23123022017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123022049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441064 + ... + 490696.

Almost surely, 2^23123022040 is an apocalyptic number.

23123022040 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 23123022040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27427748400).

23123022040 is an abundant number, since it is smaller than the sum of its proper divisors (31732474760).

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

23123022040 is a wasteful number, since it uses less digits than its factorization.

23123022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50276 (or 50272 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 23123022040 its reverse (4022032132), we get a palindrome (27145054172).

The spelling of 23123022040 in words is "twenty-three billion, one hundred twenty-three million, twenty-two thousand, forty".