18826540 has 24 divisors (see below), whose sum is σ = 39830112. Its totient is φ = 7474560.

The previous prime is 18826537. The next prime is 18826547. The reversal of 18826540 is 4562881.

It is a junction number, because it is equal to n+sod(n) for n = 18826496 and 18826505.

It is not an unprimeable number, because it can be changed into a prime (18826547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696 + ... + 6175.

It is an arithmetic number, because the mean of its divisors is an integer number (1659588).

Almost surely, 2^18826540 is an apocalyptic number.

18826540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18826540 is an abundant number, since it is smaller than the sum of its proper divisors (21003572).

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

18826540 is a wasteful number, since it uses less digits than its factorization.

18826540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7017 (or 7015 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 18826540 is about 4338.9560956525. The cubic root of 18826540 is about 266.0256443514.

The spelling of 18826540 in words is "eighteen million, eight hundred twenty-six thousand, five hundred forty".