18736520522 has 8 divisors (see below), whose sum is σ = 29758003236. Its totient is φ = 8817186112.

The previous prime is 18736520519. The next prime is 18736520527. The reversal of 18736520522 is 22502563781.

It can be written as a sum of positive squares in 2 ways, for example, as 17654702641 + 1081817881 = 132871^2 + 32891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18736520522.

It is not an unprimeable number, because it can be changed into a prime (18736520527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275537033 + ... + 275537100.

Almost surely, 2^18736520522 is an apocalyptic number.

18736520522 is a deficient number, since it is larger than the sum of its proper divisors (11021482714).

18736520522 is a wasteful number, since it uses less digits than its factorization.

18736520522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551074152.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 18736520522 in words is "eighteen billion, seven hundred thirty-six million, five hundred twenty thousand, five hundred twenty-two".