19618970 has 32 divisors (see below), whose sum is σ = 41665536. Its totient is φ = 6508800.

The previous prime is 19618967. The next prime is 19619009. The reversal of 19618970 is 7981691.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2351 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (1302048).

Almost surely, 2^19618970 is an apocalyptic number.

19618970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19618970 is an abundant number, since it is smaller than the sum of its proper divisors (22046566).

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

19618970 is a wasteful number, since it uses less digits than its factorization.

19618970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9086.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 19618970 is about 4429.3306492065. The cubic root of 19618970 is about 269.7069064613.

The spelling of 19618970 in words is "nineteen million, six hundred eighteen thousand, nine hundred seventy".