18272227946 has 32 divisors (see below), whose sum is σ = 33261580800. Its totient is φ = 7349158656.

The previous prime is 18272227943. The next prime is 18272227993. The reversal of 18272227946 is 64972227281.

It is a super-2 number, since 2×18272227946² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18272227894 and 18272227903.

It is not an unprimeable number, because it can be changed into a prime (18272227943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26930 + ... + 193053.

It is an arithmetic number, because the mean of its divisors is an integer number (1039424400).

Almost surely, 2^18272227946 is an apocalyptic number.

18272227946 is a deficient number, since it is larger than the sum of its proper divisors (14989352854).

18272227946 is a wasteful number, since it uses less digits than its factorization.

18272227946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220358.

The product of its digits is 1354752, while the sum is 50.

The spelling of 18272227946 in words is "eighteen billion, two hundred seventy-two million, two hundred twenty-seven thousand, nine hundred forty-six".