19166940 has 72 divisors (see below), whose sum is σ = 62619648. Its totient is φ = 4717440.

The previous prime is 19166933. The next prime is 19166957. The reversal of 19166940 is 4966191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19166895 and 19166904.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1756 + ... + 6435.

Almost surely, 2^19166940 is an apocalyptic number.

19166940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19166940 is an abundant number, since it is smaller than the sum of its proper divisors (43452708).

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

19166940 is a wasteful number, since it uses less digits than its factorization.

19166940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8219 (or 8214 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19166940 is about 4378.0063956098. The cubic root of 19166940 is about 267.6194010882.

The spelling of 19166940 in words is "nineteen million, one hundred sixty-six thousand, nine hundred forty".