20420400202183 has 2 divisors, whose sum is σ = 20420400202184. Its totient is φ = 20420400202182.

The previous prime is 20420400202159. The next prime is 20420400202261. The reversal of 20420400202183 is 38120200402402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20420400202183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20420400202483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210200101091 + 10210200101092.

It is an arithmetic number, because the mean of its divisors is an integer number (10210200101092).

Almost surely, 2^{20420400202183} is an apocalyptic number.

20420400202183 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420400202183 is an equidigital number, since it uses as much as digits as its factorization.

20420400202183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20420400202183 its reverse (38120200402402), we get a palindrome (58540600604585).

The spelling of 20420400202183 in words is "twenty trillion, four hundred twenty billion, four hundred million, two hundred two thousand, one hundred eighty-three".