19903969 has 8 divisors (see below), whose sum is σ = 20572992. Its totient is φ = 19244400.

The previous prime is 19903967. The next prime is 19903973. The reversal of 19903969 is 96930991.

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 19903969 - 2¹ = 19903967 is a prime.

It is a super-2 number, since 2×19903969² = 792335963905922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19903967) 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, 2052 + ... + 6634.

It is an arithmetic number, because the mean of its divisors is an integer number (2571624).

Almost surely, 2^19903969 is an apocalyptic number.

It is an amenable number.

19903969 is a deficient number, since it is larger than the sum of its proper divisors (669023).

19903969 is a wasteful number, since it uses less digits than its factorization.

19903969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 19903969 is about 4461.3864436966. The cubic root of 19903969 is about 271.0066173954.

The spelling of 19903969 in words is "nineteen million, nine hundred three thousand, nine hundred sixty-nine".