18197207270 has 16 divisors (see below), whose sum is σ = 35732698128. Its totient is φ = 6617166240.

The previous prime is 18197207251. The next prime is 18197207279. The reversal of 18197207270 is 7270279181.

It is a happy number.

It is a super-2 number, since 2×18197207270² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18197207279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82714469 + ... + 82714688.

It is an arithmetic number, because the mean of its divisors is an integer number (2233293633).

Almost surely, 2^18197207270 is an apocalyptic number.

18197207270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18197207270 is a deficient number, since it is larger than the sum of its proper divisors (17535490858).

18197207270 is a wasteful number, since it uses less digits than its factorization.

18197207270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165429175.

The product of its (nonzero) digits is 98784, while the sum is 44.

The spelling of 18197207270 in words is "eighteen billion, one hundred ninety-seven million, two hundred seven thousand, two hundred seventy".