20424490747 has 2 divisors, whose sum is σ = 20424490748. Its totient is φ = 20424490746.

The previous prime is 20424490663. The next prime is 20424490763. The reversal of 20424490747 is 74709442402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424490747 is a prime.

It is not a weakly prime, because it can be changed into another prime (20424490777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212245373 + 10212245374.

It is an arithmetic number, because the mean of its divisors is an integer number (10212245374).

Almost surely, 2^20424490747 is an apocalyptic number.

20424490747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424490747 is an equidigital number, since it uses as much as digits as its factorization.

20424490747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 20424490747 in words is "twenty billion, four hundred twenty-four million, four hundred ninety thousand, seven hundred forty-seven".