19996670 has 8 divisors (see below), whose sum is σ = 35994024. Its totient is φ = 7998664.

The previous prime is 19996663. The next prime is 19996733. The reversal of 19996670 is 7669991.

It is a happy number.

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

It is a super-2 number, since 2×19996670² = 799733622177800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999824 + ... + 999843.

It is an arithmetic number, because the mean of its divisors is an integer number (4499253).

Almost surely, 2^19996670 is an apocalyptic number.

19996670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19996670 is a deficient number, since it is larger than the sum of its proper divisors (15997354).

19996670 is a wasteful number, since it uses less digits than its factorization.

19996670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999674.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 19996670 is about 4471.7636341828. The cubic root of 19996670 is about 271.4266958055.

It can be divided in two parts, 199 and 96670, that added together give a palindrome (96869).

The spelling of 19996670 in words is "nineteen million, nine hundred ninety-six thousand, six hundred seventy".