20234643 has 32 divisors (see below), whose sum is σ = 32078592. Its totient is φ = 11184000.

The previous prime is 20234633. The next prime is 20234701. The reversal of 20234643 is 34643202.

It is a happy number.

It is not a de Polignac number, because 20234643 - 2⁶ = 20234579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20234623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43096 + ... + 43562.

It is an arithmetic number, because the mean of its divisors is an integer number (1002456).

Almost surely, 2^20234643 is an apocalyptic number.

20234643 is a deficient number, since it is larger than the sum of its proper divisors (11843949).

20234643 is a wasteful number, since it uses less digits than its factorization.

20234643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 20234643 is about 4498.2933430358. The cubic root of 20234643 is about 272.4991689788.

Adding to 20234643 its reverse (34643202), we get a palindrome (54877845).

It can be divided in two parts, 2023 and 4643, that added together give a palindrome (6666).

The spelling of 20234643 in words is "twenty million, two hundred thirty-four thousand, six hundred forty-three".