18845477422 has 16 divisors (see below), whose sum is σ = 28524529152. Its totient is φ = 9337476960.

The previous prime is 18845477407. The next prime is 18845477423. The reversal of 18845477422 is 22477454881.

It is a super-2 number, since 2×18845477422² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18845477422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18845477423) 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, 173172 + ... + 260152.

It is an arithmetic number, because the mean of its divisors is an integer number (1782783072).

Almost surely, 2^18845477422 is an apocalyptic number.

18845477422 is a deficient number, since it is larger than the sum of its proper divisors (9679051730).

18845477422 is a wasteful number, since it uses less digits than its factorization.

18845477422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87963.

The product of its digits is 4014080, while the sum is 52.

The spelling of 18845477422 in words is "eighteen billion, eight hundred forty-five million, four hundred seventy-seven thousand, four hundred twenty-two".