20420404344983 has 2 divisors, whose sum is σ = 20420404344984. Its totient is φ = 20420404344982.

The previous prime is 20420404344917. The next prime is 20420404345067. The reversal of 20420404344983 is 38944340402402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20420404344983 - 2²⁸ = 20420135909527 is a prime.

It is a super-2 number, since 2×20420404344983² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20420404344383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210202172491 + 10210202172492.

It is an arithmetic number, because the mean of its divisors is an integer number (10210202172492).

Almost surely, 2^{20420404344983} is an apocalyptic number.

20420404344983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420404344983 is an equidigital number, since it uses as much as digits as its factorization.

20420404344983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2654208, while the sum is 47.

The spelling of 20420404344983 in words is "twenty trillion, four hundred twenty billion, four hundred four million, three hundred forty-four thousand, nine hundred eighty-three".