18812533 has 2 divisors, whose sum is σ = 18812534. Its totient is φ = 18812532.

The previous prime is 18812513. The next prime is 18812569. The reversal of 18812533 is 33521881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17156164 + 1656369 = 4142^2 + 1287^2 .

It is a cyclic number.

It is not a de Polignac number, because 18812533 - 2¹³ = 18804341 is a prime.

It is a super-2 number, since 2×18812533² = 707822795752178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18812495 and 18812504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18812513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9406266 + 9406267.

It is an arithmetic number, because the mean of its divisors is an integer number (9406267).

Almost surely, 2^18812533 is an apocalyptic number.

It is an amenable number.

18812533 is a deficient number, since it is larger than the sum of its proper divisors (1).

18812533 is an equidigital number, since it uses as much as digits as its factorization.

18812533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 18812533 is about 4337.3416973995. The cubic root of 18812533 is about 265.9596533676.

It can be divided in two parts, 188 and 12533, that added together give a palindrome (12721).

The spelling of 18812533 in words is "eighteen million, eight hundred twelve thousand, five hundred thirty-three".