1836638197 has 16 divisors (see below), whose sum is σ = 1962064512. Its totient is φ = 1713208320.

The previous prime is 1836638161. The next prime is 1836638257. The reversal of 1836638197 is 7918366381.

It is not a de Polignac number, because 1836638197 - 2¹⁵ = 1836605429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1836638117) 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, 1348797 + ... + 1350157.

It is an arithmetic number, because the mean of its divisors is an integer number (122629032).

Almost surely, 2^1836638197 is an apocalyptic number.

1836638197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1836638197 is a deficient number, since it is larger than the sum of its proper divisors (125426315).

1836638197 is a wasteful number, since it uses less digits than its factorization.

1836638197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028.

The product of its digits is 1306368, while the sum is 52.

The square root of 1836638197 is about 42856.0170454512. The cubic root of 1836638197 is about 1224.6383932264.

The spelling of 1836638197 in words is "one billion, eight hundred thirty-six million, six hundred thirty-eight thousand, one hundred ninety-seven".