20424707 has 2 divisors, whose sum is σ = 20424708. Its totient is φ = 20424706.

The previous prime is 20424661. The next prime is 20424721. The reversal of 20424707 is 70742402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20424727) 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 as a sum of consecutive naturals, namely, 10212353 + 10212354.

It is an arithmetic number, because the mean of its divisors is an integer number (10212354).

Almost surely, 2^20424707 is an apocalyptic number.

20424707 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424707 is an equidigital number, since it uses as much as digits as its factorization.

20424707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 20424707 is about 4519.3701994858. The cubic root of 20424707 is about 273.3497063693.

The spelling of 20424707 in words is "twenty million, four hundred twenty-four thousand, seven hundred seven".