19964163 has 8 divisors (see below), whose sum is σ = 26795776. Its totient is φ = 13221000.

The previous prime is 19964159. The next prime is 19964173. The reversal of 19964163 is 36146991.

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

It is not a de Polignac number, because 19964163 - 2² = 19964159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19964123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21583 + ... + 22488.

It is an arithmetic number, because the mean of its divisors is an integer number (3349472).

Almost surely, 2^19964163 is an apocalyptic number.

19964163 is a deficient number, since it is larger than the sum of its proper divisors (6831613).

19964163 is a wasteful number, since it uses less digits than its factorization.

19964163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44225.

The product of its digits is 34992, while the sum is 39.

The square root of 19964163 is about 4468.1274601336. The cubic root of 19964163 is about 271.2795370866.

The spelling of 19964163 in words is "nineteen million, nine hundred sixty-four thousand, one hundred sixty-three".