18860550937 has 4 divisors (see below), whose sum is σ = 18861124480. Its totient is φ = 18859977396.

The previous prime is 18860550931. The next prime is 18860551033. The reversal of 18860550937 is 73905506881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73905506881 = 9067 ⋅8151043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18860550937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18860550931) 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, 234237 + ... + 304282.

It is an arithmetic number, because the mean of its divisors is an integer number (4715281120).

Almost surely, 2^18860550937 is an apocalyptic number.

It is an amenable number.

18860550937 is a deficient number, since it is larger than the sum of its proper divisors (573543).

18860550937 is an equidigital number, since it uses as much as digits as its factorization.

18860550937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573542.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 18860550937 in words is "eighteen billion, eight hundred sixty million, five hundred fifty thousand, nine hundred thirty-seven".