1818825837 has 16 divisors (see below), whose sum is σ = 2482882752. Its totient is φ = 1183950720.

The previous prime is 1818825823. The next prime is 1818825839. The reversal of 1818825837 is 7385288181.

It is not a de Polignac number, because 1818825837 - 2⁴ = 1818825821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1818825837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818825839) 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, 11203 + ... + 61344.

It is an arithmetic number, because the mean of its divisors is an integer number (155180172).

Almost surely, 2^1818825837 is an apocalyptic number.

It is an amenable number.

1818825837 is a deficient number, since it is larger than the sum of its proper divisors (664056915).

1818825837 is a wasteful number, since it uses less digits than its factorization.

1818825837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72748.

The product of its digits is 860160, while the sum is 51.

The square root of 1818825837 is about 42647.6943925460. The cubic root of 1818825837 is about 1220.6665346863. Note that the first 3 decimals are identical.

The spelling of 1818825837 in words is "one billion, eight hundred eighteen million, eight hundred twenty-five thousand, eight hundred thirty-seven".