20207434 has 8 divisors (see below), whose sum is σ = 32642820. Its totient is φ = 9326496.

The previous prime is 20207419. The next prime is 20207437. The reversal of 20207434 is 43470202.

It can be written as a sum of positive squares in 2 ways, for example, as 19829209 + 378225 = 4453^2 + 615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20207437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388579 + ... + 388630.

Almost surely, 2^20207434 is an apocalyptic number.

20207434 is a deficient number, since it is larger than the sum of its proper divisors (12435386).

20207434 is a wasteful number, since it uses less digits than its factorization.

20207434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777224.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20207434 is about 4495.2679564182. The cubic root of 20207434 is about 272.3769733346.

Adding to 20207434 its reverse (43470202), we get a palindrome (63677636).

The spelling of 20207434 in words is "twenty million, two hundred seven thousand, four hundred thirty-four".