18730436446 has 16 divisors (see below), whose sum is σ = 29327865984. Its totient is φ = 8954777304.

The previous prime is 18730436429. The next prime is 18730436449. The reversal of 18730436446 is 64463403781.

It is a super-2 number, since 2×18730436446² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 18730436396 and 18730436405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730436449) 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, 56305 + ... + 201571.

It is an arithmetic number, because the mean of its divisors is an integer number (1832991624).

Almost surely, 2^18730436446 is an apocalyptic number.

18730436446 is a deficient number, since it is larger than the sum of its proper divisors (10597429538).

18730436446 is a wasteful number, since it uses less digits than its factorization.

18730436446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148095.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 18730436446 in words is "eighteen billion, seven hundred thirty million, four hundred thirty-six thousand, four hundred forty-six".