20426469 has 32 divisors (see below), whose sum is σ = 34110720. Its totient is φ = 10601472.

The previous prime is 20426459. The next prime is 20426473. The reversal of 20426469 is 96462402.

It is a happy number.

It is not a de Polignac number, because 20426469 - 2¹¹ = 20424421 is a prime.

It is a super-2 number, since 2×20426469² = 834481271615922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9367 + ... + 11339.

It is an arithmetic number, because the mean of its divisors is an integer number (1065960).

Almost surely, 2^20426469 is an apocalyptic number.

20426469 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20426469 is a deficient number, since it is larger than the sum of its proper divisors (13684251).

20426469 is a wasteful number, since it uses less digits than its factorization.

20426469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20426469 is about 4519.5651339482. The cubic root of 20426469 is about 273.3575665936.

The spelling of 20426469 in words is "twenty million, four hundred twenty-six thousand, four hundred sixty-nine".