20434507 has 2 divisors, whose sum is σ = 20434508. Its totient is φ = 20434506.

The previous prime is 20434501. The next prime is 20434537. The reversal of 20434507 is 70543402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20434507 - 2³ = 20434499 is a prime.

It is not a weakly prime, because it can be changed into another prime (20434501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217253 + 10217254.

It is an arithmetic number, because the mean of its divisors is an integer number (10217254).

Almost surely, 2^20434507 is an apocalyptic number.

20434507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434507 is an equidigital number, since it uses as much as digits as its factorization.

20434507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20434507 is about 4520.4542913296. The cubic root of 20434507 is about 273.3934181150.

Adding to 20434507 its reverse (70543402), we get a palindrome (90977909).

The spelling of 20434507 in words is "twenty million, four hundred thirty-four thousand, five hundred seven".