19948669 has 4 divisors (see below), whose sum is σ = 21483196. Its totient is φ = 18414144.

The previous prime is 19948639. The next prime is 19948679. The reversal of 19948669 is 96684991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1026169 + 18922500 = 1013^2 + 4350^2 .

It is a cyclic number.

It is not a de Polignac number, because 19948669 - 2⁷ = 19948541 is a prime.

It is a super-2 number, since 2×19948669² = 795898789743122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19948639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767244 + ... + 767269.

It is an arithmetic number, because the mean of its divisors is an integer number (5370799).

Almost surely, 2^19948669 is an apocalyptic number.

It is an amenable number.

19948669 is a deficient number, since it is larger than the sum of its proper divisors (1534527).

19948669 is a wasteful number, since it uses less digits than its factorization.

19948669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534526.

The product of its digits is 839808, while the sum is 52.

The square root of 19948669 is about 4466.3932876539. The cubic root of 19948669 is about 271.2093397540.

The spelling of 19948669 in words is "nineteen million, nine hundred forty-eight thousand, six hundred sixty-nine".