18850537 has 4 divisors (see below), whose sum is σ = 18904900. Its totient is φ = 18796176.

The previous prime is 18850523. The next prime is 18850541. The reversal of 18850537 is 73505881.

It is the 1773-rd star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73505881 = 101 ⋅727781.

It can be written as a sum of positive squares in 2 ways, for example, as 7160976 + 11689561 = 2676^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 18850537 - 2¹⁹ = 18326249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18850496 and 18850505.

It is not an unprimeable number, because it can be changed into a prime (18850567) 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, 26658 + ... + 27355.

It is an arithmetic number, because the mean of its divisors is an integer number (4726225).

Almost surely, 2^18850537 is an apocalyptic number.

It is an amenable number.

18850537 is a deficient number, since it is larger than the sum of its proper divisors (54363).

18850537 is an equidigital number, since it uses as much as digits as its factorization.

18850537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54362.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 18850537 is about 4341.7205115023. The cubic root of 18850537 is about 266.1386250506.

The spelling of 18850537 in words is "eighteen million, eight hundred fifty thousand, five hundred thirty-seven".