19954469 has 4 divisors (see below), whose sum is σ = 20152140. Its totient is φ = 19756800.

The previous prime is 19954453. The next prime is 19954471. The reversal of 19954469 is 96445991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96445991 = 31 ⋅3111161.

It can be written as a sum of positive squares in 2 ways, for example, as 18809569 + 1144900 = 4337^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 19954469 - 2⁴ = 19954453 is a prime.

It is a super-2 number, since 2×19954469² = 796361666143922, 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 (19954439) 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, 98684 + ... + 98885.

It is an arithmetic number, because the mean of its divisors is an integer number (5038035).

Almost surely, 2^19954469 is an apocalyptic number.

It is an amenable number.

19954469 is a deficient number, since it is larger than the sum of its proper divisors (197671).

19954469 is a wasteful number, since it uses less digits than its factorization.

19954469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197670.

The product of its digits is 349920, while the sum is 47.

The square root of 19954469 is about 4467.0425339367. The cubic root of 19954469 is about 271.2356215700.

The spelling of 19954469 in words is "nineteen million, nine hundred fifty-four thousand, four hundred sixty-nine".