20424907 has 2 divisors, whose sum is σ = 20424908. Its totient is φ = 20424906.

The previous prime is 20424893. The next prime is 20424913. The reversal of 20424907 is 70942402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20424907 - 2¹¹ = 20422859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20424917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212453 + 10212454.

It is an arithmetic number, because the mean of its divisors is an integer number (10212454).

Almost surely, 2^20424907 is an apocalyptic number.

20424907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424907 is an equidigital number, since it uses as much as digits as its factorization.

20424907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20424907 is about 4519.3923264085. The cubic root of 20424907 is about 273.3505985855.

The spelling of 20424907 in words is "twenty million, four hundred twenty-four thousand, nine hundred seven".