18645735643732 has 24 divisors (see below), whose sum is σ = 33766239233160. Its totient is φ = 8998448780160.

The previous prime is 18645735643709. The next prime is 18645735643747. The reversal of 18645735643732 is 23734653754681.

It can be written as a sum of positive squares in 4 ways, for example, as 5252741436996 + 13392994206736 = 2291886^2 + 3659644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25900903 + ... + 26611054.

It is an arithmetic number, because the mean of its divisors is an integer number (1406926634715).

Almost surely, 2^{18645735643732} is an apocalyptic number.

It is an amenable number.

18645735643732 is a deficient number, since it is larger than the sum of its proper divisors (15120503589428).

18645735643732 is a wasteful number, since it uses less digits than its factorization.

18645735643732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52515051 (or 52515049 counting only the distinct ones).

The product of its digits is 304819200, while the sum is 64.

The spelling of 18645735643732 in words is "eighteen trillion, six hundred forty-five billion, seven hundred thirty-five million, six hundred forty-three thousand, seven hundred thirty-two".