23784733729 has 9 divisors (see below), whose sum is σ = 25105540467. Its totient is φ = 22530129624.

The previous prime is 23784733727. The next prime is 23784733747. The reversal of 23784733729 is 92733748732.

The square root of 23784733729 is 154223.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21542900625 + 2241833104 = 146775^2 + 47348^2 .

It is not a de Polignac number, because 23784733729 - 2¹ = 23784733727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23784733729.

It is not an unprimeable number, because it can be changed into a prime (23784733723) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2926179 + ... + 2934295.

Almost surely, 2^23784733729 is an apocalyptic number.

23784733729 is the 154223-rd square number.

23784733729 is the 77112-nd centered octagonal number.

It is an amenable number.

23784733729 is a deficient number, since it is larger than the sum of its proper divisors (1320806738).

23784733729 is an frugal number, since it uses more digits than its factorization.

23784733729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16272 (or 8136 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 55.

The spelling of 23784733729 in words is "twenty-three billion, seven hundred eighty-four million, seven hundred thirty-three thousand, seven hundred twenty-nine".