23023420040 has 32 divisors (see below), whose sum is σ = 52261136280. Its totient is φ = 9127867392.

The previous prime is 23023420019. The next prime is 23023420051. The reversal of 23023420040 is 4002432032.

It can be written as a sum of positive squares in 4 ways, for example, as 13036615684 + 9986804356 = 114178^2 + 99934^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 23023419994 and 23023420021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2542319 + ... + 2551358.

Almost surely, 2^23023420040 is an apocalyptic number.

23023420040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23023420040 is an abundant number, since it is smaller than the sum of its proper divisors (29237716240).

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

23023420040 is a wasteful number, since it uses less digits than its factorization.

23023420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093801 (or 5093797 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 23023420040 its reverse (4002432032), we get a palindrome (27025852072).

The spelling of 23023420040 in words is "twenty-three billion, twenty-three million, four hundred twenty thousand, forty".