19112040 has 48 divisors (see below), whose sum is σ = 62115300. Its totient is φ = 5096448.

The previous prime is 19112021. The next prime is 19112053. The reversal of 19112040 is 4021191.

It can be written as a sum of positive squares in 2 ways, for example, as 17089956 + 2022084 = 4134^2 + 1422^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26185 + ... + 26904.

Almost surely, 2^19112040 is an apocalyptic number.

19112040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19112040 is an abundant number, since it is smaller than the sum of its proper divisors (43003260).

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

19112040 is a wasteful number, since it uses less digits than its factorization.

19112040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53106 (or 53099 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 19112040 is about 4371.7319222477. The cubic root of 19112040 is about 267.3636420357.

The spelling of 19112040 in words is "nineteen million, one hundred twelve thousand, forty".