19892040 has 192 divisors, whose sum is σ = 73872000. Its totient is φ = 4257792.

The previous prime is 19892021. The next prime is 19892053. The reversal of 19892040 is 4029891.

It is a junction number, because it is equal to n+sod(n) for n = 19891992 and 19892010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99861 + ... + 100059.

It is an arithmetic number, because the mean of its divisors is an integer number (384750).

Almost surely, 2^19892040 is an apocalyptic number.

19892040 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 19892040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36936000).

19892040 is an abundant number, since it is smaller than the sum of its proper divisors (53979960).

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

19892040 is a wasteful number, since it uses less digits than its factorization.

19892040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 19892040 is about 4460.0493270815. The cubic root of 19892040 is about 270.9524659847.

The spelling of 19892040 in words is "nineteen million, eight hundred ninety-two thousand, forty".