18161526 has 8 divisors (see below), whose sum is σ = 36323064. Its totient is φ = 6053840.

The previous prime is 18161509. The next prime is 18161527. The reversal of 18161526 is 62516181.

It is a sphenic number, since it is the product of 3 distinct primes.

18161526 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18161493 and 18161502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18161527) 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, 1513455 + ... + 1513466.

It is an arithmetic number, because the mean of its divisors is an integer number (4540383).

Almost surely, 2^18161526 is an apocalyptic number.

18161526 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18161526 is a wasteful number, since it uses less digits than its factorization.

18161526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026926.

The product of its digits is 2880, while the sum is 30.

The square root of 18161526 is about 4261.6341935929. The cubic root of 18161526 is about 262.8557281464.

The spelling of 18161526 in words is "eighteen million, one hundred sixty-one thousand, five hundred twenty-six".