23031365840 has 40 divisors (see below), whose sum is σ = 61197630720. Its totient is φ = 7896468096.

The previous prime is 23031365827. The next prime is 23031365873. The reversal of 23031365840 is 4856313032.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 23031365840.

It is a congruent number.

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, 20563160 + ... + 20564279.

It is an arithmetic number, because the mean of its divisors is an integer number (1529940768).

Almost surely, 2^23031365840 is an apocalyptic number.

23031365840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23031365840 is an abundant number, since it is smaller than the sum of its proper divisors (38166264880).

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

23031365840 is a wasteful number, since it uses less digits than its factorization.

23031365840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41127459 (or 41127453 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 23031365840 its reverse (4856313032), we get a palindrome (27887678872).

The spelling of 23031365840 in words is "twenty-three billion, thirty-one million, three hundred sixty-five thousand, eight hundred forty".