19688020 has 24 divisors (see below), whose sum is σ = 45103968. Its totient is φ = 7159200.

The previous prime is 19687991. The next prime is 19688029. The reversal of 19688020 is 2088691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19688029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44526 + ... + 44965.

It is an arithmetic number, because the mean of its divisors is an integer number (1879332).

Almost surely, 2^19688020 is an apocalyptic number.

19688020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19688020 is an abundant number, since it is smaller than the sum of its proper divisors (25415948).

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

19688020 is a wasteful number, since it uses less digits than its factorization.

19688020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89511 (or 89509 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 19688020 is about 4437.1184342994. The cubic root of 19688020 is about 270.0229518669.

The spelling of 19688020 in words is "nineteen million, six hundred eighty-eight thousand, twenty".