19929965 has 8 divisors (see below), whose sum is σ = 26090208. Its totient is φ = 14494480.

The previous prime is 19929953. The next prime is 19929979. The reversal of 19929965 is 56992991.

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

It is not a de Polignac number, because 19929965 - 2⁶ = 19929901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181127 + ... + 181236.

It is an arithmetic number, because the mean of its divisors is an integer number (3261276).

Almost surely, 2^19929965 is an apocalyptic number.

It is an amenable number.

19929965 is a deficient number, since it is larger than the sum of its proper divisors (6160243).

19929965 is a wasteful number, since it uses less digits than its factorization.

19929965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362379.

The product of its digits is 393660, while the sum is 50.

The square root of 19929965 is about 4464.2989371233. The cubic root of 19929965 is about 271.1245507101.

The spelling of 19929965 in words is "nineteen million, nine hundred twenty-nine thousand, nine hundred sixty-five".