19909070 has 8 divisors (see below), whose sum is σ = 35836344. Its totient is φ = 7963624.

The previous prime is 19909061. The next prime is 19909073. The reversal of 19909070 is 7090991.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19909070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19909073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995444 + ... + 995463.

It is an arithmetic number, because the mean of its divisors is an integer number (4479543).

Almost surely, 2^19909070 is an apocalyptic number.

19909070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19909070 is a deficient number, since it is larger than the sum of its proper divisors (15927274).

19909070 is a wasteful number, since it uses less digits than its factorization.

19909070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990914.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 19909070 is about 4461.9580903455. The cubic root of 19909070 is about 271.0297666590.

The spelling of 19909070 in words is "nineteen million, nine hundred nine thousand, seventy".