19692140 has 96 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 6690816.

The previous prime is 19692121. The next prime is 19692143. The reversal of 19692140 is 4129691.

It is a junction number, because it is equal to n+sod(n) for n = 19692097 and 19692106.

It is not an unprimeable number, because it can be changed into a prime (19692143) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 221216 + ... + 221304.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^19692140 is an apocalyptic number.

19692140 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 19692140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24131520).

19692140 is an abundant number, since it is smaller than the sum of its proper divisors (28570900).

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

19692140 is a wasteful number, since it uses less digits than its factorization.

19692140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19692140 is about 4437.5826752862. The cubic root of 19692140 is about 270.0417859425.

The spelling of 19692140 in words is "nineteen million, six hundred ninety-two thousand, one hundred forty".