23111204020440 has 32 divisors (see below), whose sum is σ = 69333612061680. Its totient is φ = 6162987738752.

The previous prime is 23111204020433. The next prime is 23111204020507. The reversal of 23111204020440 is 4402040211132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23111204020440.

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, 96296683299 + ... + 96296683538.

Almost surely, 2^{23111204020440} is an apocalyptic number.

23111204020440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23111204020440 is an abundant number, since it is smaller than the sum of its proper divisors (46222408041240).

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

23111204020440 is a wasteful number, since it uses less digits than its factorization.

23111204020440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192593366851 (or 192593366847 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 23111204020440 its reverse (4402040211132), we get a palindrome (27513244231572).

The spelling of 23111204020440 in words is "twenty-three trillion, one hundred eleven billion, two hundred four million, twenty thousand, four hundred forty".