18726131 has 2 divisors, whose sum is σ = 18726132. Its totient is φ = 18726130.

The previous prime is 18726109. The next prime is 18726133. The reversal of 18726131 is 13162781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18726131 - 2⁶ = 18726067 is a prime.

It is a super-2 number, since 2×18726131² = 701335964458322, which contains 22 as substring.

Together with 18726133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18726094 and 18726103.

It is not a weakly prime, because it can be changed into another prime (18726133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9363065 + 9363066.

It is an arithmetic number, because the mean of its divisors is an integer number (9363066).

Almost surely, 2^18726131 is an apocalyptic number.

18726131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18726131 is an equidigital number, since it uses as much as digits as its factorization.

18726131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 18726131 is about 4327.3699864930. The cubic root of 18726131 is about 265.5518628816.

The spelling of 18726131 in words is "eighteen million, seven hundred twenty-six thousand, one hundred thirty-one".