18367801802 has 24 divisors (see below), whose sum is σ = 32283904644. Its totient is φ = 7814450112.

The previous prime is 18367801789. The next prime is 18367801807. The reversal of 18367801802 is 20810876381.

It can be written as a sum of positive squares in 2 ways, for example, as 17590451641 + 777350161 = 132629^2 + 27881^2 .

It is a super-2 number, since 2×18367801802² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18367801807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 670613 + ... + 697464.

Almost surely, 2^18367801802 is an apocalyptic number.

18367801802 is a deficient number, since it is larger than the sum of its proper divisors (13916102842).

18367801802 is a wasteful number, since it uses less digits than its factorization.

18367801802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368230 (or 1368223 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 18367801802 in words is "eighteen billion, three hundred sixty-seven million, eight hundred one thousand, eight hundred two".