18397540626 has 16 divisors (see below), whose sum is σ = 37650781344. Its totient is φ = 5989896864.

The previous prime is 18397540621. The next prime is 18397540691. The reversal of 18397540626 is 62604579381.

It is not an unprimeable number, because it can be changed into a prime (18397540621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35653891 + ... + 35654406.

It is an arithmetic number, because the mean of its divisors is an integer number (2353173834).

It is a 1-persistent number, because it is pandigital, but 2⋅18397540626 = 36795081252 is not.

Almost surely, 2^18397540626 is an apocalyptic number.

18397540626 is an abundant number, since it is smaller than the sum of its proper divisors (19253240718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18397540626 is a wasteful number, since it uses less digits than its factorization.

18397540626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71308345.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 18397540626 in words is "eighteen billion, three hundred ninety-seven million, five hundred forty thousand, six hundred twenty-six".