20434755 has 32 divisors (see below), whose sum is σ = 35877888. Its totient is φ = 9849600.

The previous prime is 20434703. The next prime is 20434759. The reversal of 20434755 is 55743402.

It is not a de Polignac number, because 20434755 - 2⁸ = 20434499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434759) 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, 44487 + ... + 44943.

It is an arithmetic number, because the mean of its divisors is an integer number (1121184).

Almost surely, 2^20434755 is an apocalyptic number.

20434755 is a deficient number, since it is larger than the sum of its proper divisors (15443133).

20434755 is a wasteful number, since it uses less digits than its factorization.

20434755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 20434755 is about 4520.4817221177. The cubic root of 20434755 is about 273.3945241085.

It can be divided in two parts, 204347 and 55, that added together give a palindrome (204402).

The spelling of 20434755 in words is "twenty million, four hundred thirty-four thousand, seven hundred fifty-five".