23267761920 has 720 divisors, whose sum is σ = 91452500832. Its totient is φ = 5613649920.

The previous prime is 23267761919. The next prime is 23267761927. The reversal of 23267761920 is 2916776232.

23267761920 is a `hidden beast` number, since 2 + 3 + 2 + 6 + 7 + 7 + 619 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23267761927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 82218099 + ... + 82218381.

Almost surely, 2^23267761920 is an apocalyptic number.

23267761920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23267761920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45726250416).

23267761920 is an abundant number, since it is smaller than the sum of its proper divisors (68184738912).

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

23267761920 is a wasteful number, since it uses less digits than its factorization.

23267761920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 23267761920 in words is "twenty-three billion, two hundred sixty-seven million, seven hundred sixty-one thousand, nine hundred twenty".