20969469 has 16 divisors (see below), whose sum is σ = 31494400. Its totient is φ = 13786848.

The previous prime is 20969453. The next prime is 20969471. The reversal of 20969469 is 96496902.

It is not a de Polignac number, because 20969469 - 2⁴ = 20969453 is a prime.

It is a super-2 number, since 2×20969469² = 879437260283922, 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 (20969419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3349 + ... + 7290.

It is an arithmetic number, because the mean of its divisors is an integer number (1968400).

Almost surely, 2^20969469 is an apocalyptic number.

It is an amenable number.

20969469 is a deficient number, since it is larger than the sum of its proper divisors (10524931).

20969469 is a wasteful number, since it uses less digits than its factorization.

20969469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10721 (or 10715 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 20969469 is about 4579.2432780974. The cubic root of 20969469 is about 275.7586500702.

The spelling of 20969469 in words is "twenty million, nine hundred sixty-nine thousand, four hundred sixty-nine".