23020144040 has 32 divisors (see below), whose sum is σ = 54842109480. Its totient is φ = 8666406912.

The previous prime is 23020143977. The next prime is 23020144061. The reversal of 23020144040 is 4044102032.

It can be written as a sum of positive squares in 4 ways, for example, as 19520001796 + 3500142244 = 139714^2 + 59162^2 .

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

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, 16925897 + ... + 16927256.

Almost surely, 2^23020144040 is an apocalyptic number.

23020144040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23020144040 is an abundant number, since it is smaller than the sum of its proper divisors (31821965440).

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

23020144040 is a wasteful number, since it uses less digits than its factorization.

23020144040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33853181 (or 33853177 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 23020144040 its reverse (4044102032), we get a palindrome (27064246072).

The spelling of 23020144040 in words is "twenty-three billion, twenty million, one hundred forty-four thousand, forty".