19019970 has 24 divisors (see below), whose sum is σ = 49452156. Its totient is φ = 5071968.

The previous prime is 19019953. The next prime is 19020037. The reversal of 19019970 is 7991091.

It can be written as a sum of positive squares in 2 ways, for example, as 18378369 + 641601 = 4287^2 + 801^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105577 + ... + 105756.

Almost surely, 2^19019970 is an apocalyptic number.

19019970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19019970 is an abundant number, since it is smaller than the sum of its proper divisors (30432186).

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

19019970 is a wasteful number, since it uses less digits than its factorization.

19019970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211346 (or 211343 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 19019970 is about 4361.1890580437. The cubic root of 19019970 is about 266.9336198236.

The spelling of 19019970 in words is "nineteen million, nineteen thousand, nine hundred seventy".