18628011 has 12 divisors (see below), whose sum is σ = 27363960. Its totient is φ = 12207840.

The previous prime is 18628003. The next prime is 18628013. The reversal of 18628011 is 11082681.

It is not a de Polignac number, because 18628011 - 2³ = 18628003 is a prime.

It is a super-2 number, since 2×18628011² = 694005587632242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18628013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17010 + ... + 18071.

It is an arithmetic number, because the mean of its divisors is an integer number (2280330).

Almost surely, 2^18628011 is an apocalyptic number.

18628011 is a deficient number, since it is larger than the sum of its proper divisors (8735949).

18628011 is a wasteful number, since it uses less digits than its factorization.

18628011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35146 (or 35143 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 18628011 is about 4316.0179564038. The cubic root of 18628011 is about 265.0872431390.

The spelling of 18628011 in words is "eighteen million, six hundred twenty-eight thousand, eleven".