18269564072 has 32 divisors (see below), whose sum is σ = 35454169800. Its totient is φ = 8815430400.

The previous prime is 18269564003. The next prime is 18269564077. The reversal of 18269564072 is 27046596281.

It can be written as a sum of positive squares in 4 ways, for example, as 14838650596 + 3430913476 = 121814^2 + 58574^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18269564072.

It is not an unprimeable number, because it can be changed into a prime (18269564077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478322 + ... + 515102.

Almost surely, 2^18269564072 is an apocalyptic number.

It is an amenable number.

18269564072 is a deficient number, since it is larger than the sum of its proper divisors (17184605728).

18269564072 is a wasteful number, since it uses less digits than its factorization.

18269564072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38957 (or 38953 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 18269564072 in words is "eighteen billion, two hundred sixty-nine million, five hundred sixty-four thousand, seventy-two".