18640295240636 has 12 divisors (see below), whose sum is σ = 32635969322880. Its totient is φ = 9315732576960.

The previous prime is 18640295240549. The next prime is 18640295240641. The reversal of 18640295240636 is 63604259204681.

It is a super-2 number, since 2×18640295240636² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1103751341 + ... + 1103768228.

It is an arithmetic number, because the mean of its divisors is an integer number (2719664110240).

Almost surely, 2^{18640295240636} is an apocalyptic number.

It is an amenable number.

18640295240636 is a deficient number, since it is larger than the sum of its proper divisors (13995674082244).

18640295240636 is a wasteful number, since it uses less digits than its factorization.

18640295240636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207521684 (or 2207521682 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 18640295240636 in words is "eighteen trillion, six hundred forty billion, two hundred ninety-five million, two hundred forty thousand, six hundred thirty-six".