20434455 has 24 divisors (see below), whose sum is σ = 35526192. Its totient is φ = 10865664.

The previous prime is 20434411. The next prime is 20434457. The reversal of 20434455 is 55443402.

20434455 is a `hidden beast` number, since 204 + 3 + 4 + 455 = 666.

It is not a de Polignac number, because 20434455 - 2⁹ = 20433943 is a prime.

It is a super-2 number, since 2×20434455² = 835133902294050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25572 + ... + 26358.

It is an arithmetic number, because the mean of its divisors is an integer number (1480258).

Almost surely, 2^20434455 is an apocalyptic number.

20434455 is a deficient number, since it is larger than the sum of its proper divisors (15091737).

20434455 is a wasteful number, since it uses less digits than its factorization.

20434455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 20434455 is about 4520.4485396916. The cubic root of 20434455 is about 273.3931862120.

Adding to 20434455 its reverse (55443402), we get a palindrome (75877857).

The spelling of 20434455 in words is "twenty million, four hundred thirty-four thousand, four hundred fifty-five".