23026401640 has 48 divisors (see below), whose sum is σ = 56947538340. Its totient is φ = 8373235200.

The previous prime is 23026401617. The next prime is 23026401641. The reversal of 23026401640 is 4610462032.

It can be written as a sum of positive squares in 2 ways, for example, as 21655476964 + 1370924676 = 147158^2 + 37026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23026401599 and 23026401608.

It is not an unprimeable number, because it can be changed into a prime (23026401641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2373921 + ... + 2383600.

Almost surely, 2^23026401640 is an apocalyptic number.

23026401640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23026401640 is an abundant number, since it is smaller than the sum of its proper divisors (33921136700).

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

23026401640 is a wasteful number, since it uses less digits than its factorization.

23026401640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757554 (or 4757539 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 23026401640 its reverse (4610462032), we get a palindrome (27636863672).

The spelling of 23026401640 in words is "twenty-three billion, twenty-six million, four hundred one thousand, six hundred forty".