19949969 has 8 divisors (see below), whose sum is σ = 21628992. Its totient is φ = 18291600.

The previous prime is 19949953. The next prime is 19949977. The reversal of 19949969 is 96994991.

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

It is a cyclic number.

It is not a de Polignac number, because 19949969 - 2⁴ = 19949953 is a prime.

It is a super-2 number, since 2×19949969² = 796002526201922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19949929) 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, 3119 + ... + 7044.

It is an arithmetic number, because the mean of its divisors is an integer number (2703624).

Almost surely, 2^19949969 is an apocalyptic number.

It is an amenable number.

19949969 is a deficient number, since it is larger than the sum of its proper divisors (1679023).

19949969 is a wasteful number, since it uses less digits than its factorization.

19949969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327.

The product of its digits is 1417176, while the sum is 56.

The square root of 19949969 is about 4466.5388165782. The cubic root of 19949969 is about 271.2152309488.

The spelling of 19949969 in words is "nineteen million, nine hundred forty-nine thousand, nine hundred sixty-nine".