18770540 has 24 divisors (see below), whose sum is σ = 40778640. Its totient is φ = 7249088.

The previous prime is 18770539. The next prime is 18770561. The reversal of 18770540 is 4507781.

It is a junction number, because it is equal to n+sod(n) for n = 18770497 and 18770506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15602 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (1699110).

Almost surely, 2^18770540 is an apocalyptic number.

18770540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18770540 is an abundant number, since it is smaller than the sum of its proper divisors (22008100).

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

18770540 is a wasteful number, since it uses less digits than its factorization.

18770540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32401 (or 32399 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18770540 is about 4332.4981246389. The cubic root of 18770540 is about 265.7616158139.

The spelling of 18770540 in words is "eighteen million, seven hundred seventy thousand, five hundred forty".