18370020037 has 4 divisors (see below), whose sum is σ = 18532586700. Its totient is φ = 18207453376.

The previous prime is 18370020023. The next prime is 18370020133. The reversal of 18370020037 is 73002007381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9102877281 + 9267142756 = 95409^2 + 96266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18370020037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18370019990 and 18370020008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18370020017) 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, 81283162 + ... + 81283387.

It is an arithmetic number, because the mean of its divisors is an integer number (4633146675).

Almost surely, 2^18370020037 is an apocalyptic number.

It is an amenable number.

18370020037 is a deficient number, since it is larger than the sum of its proper divisors (162566663).

18370020037 is a wasteful number, since it uses less digits than its factorization.

18370020037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162566662.

The product of its (nonzero) digits is 7056, while the sum is 31.

The spelling of 18370020037 in words is "eighteen billion, three hundred seventy million, twenty thousand, thirty-seven".