20432434 has 16 divisors (see below), whose sum is σ = 33734880. Its totient is φ = 9204160.

The previous prime is 20432407. The next prime is 20432437. The reversal of 20432434 is 43423402.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20432437) 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 7 ways as a sum of consecutive naturals, for example, 1624 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (2108430).

Almost surely, 2^20432434 is an apocalyptic number.

20432434 is a deficient number, since it is larger than the sum of its proper divisors (13302446).

20432434 is a wasteful number, since it uses less digits than its factorization.

20432434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8345.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 20432434 is about 4520.2249944002. The cubic root of 20432434 is about 273.3841729083.

Adding to 20432434 its reverse (43423402), we get a palindrome (63855836).

The spelling of 20432434 in words is "twenty million, four hundred thirty-two thousand, four hundred thirty-four".