19122040 has 64 divisors (see below), whose sum is σ = 50780160. Its totient is φ = 6341760.

The previous prime is 19122023. The next prime is 19122079. The reversal of 19122040 is 4022191.

It is a junction number, because it is equal to n+sod(n) for n = 19121999 and 19122017.

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 15 ways as a sum of consecutive naturals, for example, 7579 + ... + 9781.

It is an arithmetic number, because the mean of its divisors is an integer number (793440).

Almost surely, 2^19122040 is an apocalyptic number.

19122040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19122040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25390080).

19122040 is an abundant number, since it is smaller than the sum of its proper divisors (31658120).

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

19122040 is a wasteful number, since it uses less digits than its factorization.

19122040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 19122040 is about 4372.8754841637. The cubic root of 19122040 is about 267.4102648321.

The spelling of 19122040 in words is "nineteen million, one hundred twenty-two thousand, forty".