20433969 has 6 divisors (see below), whose sum is σ = 29515746. Its totient is φ = 13622640.

The previous prime is 20433967. The next prime is 20433971. The reversal of 20433969 is 96933402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20433967) and next prime (20433971).

It can be written as a sum of positive squares in only one way, i.e., 15303744 + 5130225 = 3912^2 + 2265^2 .

It is not a de Polignac number, because 20433969 - 2¹ = 20433967 is a prime.

It is a super-2 number, since 2×20433969² = 835094178185922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20433967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1135212 + ... + 1135229.

It is an arithmetic number, because the mean of its divisors is an integer number (4919291).

Almost surely, 2^20433969 is an apocalyptic number.

It is an amenable number.

20433969 is a deficient number, since it is larger than the sum of its proper divisors (9081777).

20433969 is a wasteful number, since it uses less digits than its factorization.

20433969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270447 (or 2270444 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20433969 is about 4520.3947836445. The cubic root of 20433969 is about 273.3910187920.

The spelling of 20433969 in words is "twenty million, four hundred thirty-three thousand, nine hundred sixty-nine".