19708090 has 8 divisors (see below), whose sum is σ = 35474580. Its totient is φ = 7883232.

The previous prime is 19708069. The next prime is 19708093. The reversal of 19708090 is 9080791.

It can be written as a sum of positive squares in 2 ways, for example, as 19562929 + 145161 = 4423^2 + 381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19708090² = 776817622896200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19708093) 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 3 ways as a sum of consecutive naturals, for example, 985395 + ... + 985414.

Almost surely, 2^19708090 is an apocalyptic number.

19708090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19708090 is a deficient number, since it is larger than the sum of its proper divisors (15766490).

19708090 is a wasteful number, since it uses less digits than its factorization.

19708090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970816.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 19708090 is about 4439.3794611409. The cubic root of 19708090 is about 270.1146746537.

The spelling of 19708090 in words is "nineteen million, seven hundred eight thousand, ninety".