19133940 has 48 divisors (see below), whose sum is σ = 61229952. Its totient is φ = 4373376.

The previous prime is 19133903. The next prime is 19133941. The reversal of 19133940 is 4933191.

It is a super-2 number, since 2×19133940² = 732215319847200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 19133898 and 19133907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19133941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22359 + ... + 23198.

It is an arithmetic number, because the mean of its divisors is an integer number (1275624).

Almost surely, 2^19133940 is an apocalyptic number.

19133940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19133940 is an abundant number, since it is smaller than the sum of its proper divisors (42096012).

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

19133940 is a wasteful number, since it uses less digits than its factorization.

19133940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45576 (or 45574 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 19133940 is about 4374.2359332802. The cubic root of 19133940 is about 267.4657247842.

The spelling of 19133940 in words is "nineteen million, one hundred thirty-three thousand, nine hundred forty".