20402221403 has 2 divisors, whose sum is σ = 20402221404. Its totient is φ = 20402221402.

The previous prime is 20402221391. The next prime is 20402221409. The reversal of 20402221403 is 30412220402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20402221403 - 2¹² = 20402217307 is a prime.

It is not a weakly prime, because it can be changed into another prime (20402221409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201110701 + 10201110702.

It is an arithmetic number, because the mean of its divisors is an integer number (10201110702).

Almost surely, 2^20402221403 is an apocalyptic number.

20402221403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402221403 is an equidigital number, since it uses as much as digits as its factorization.

20402221403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20402221403 its reverse (30412220402), we get a palindrome (50814441805).

The spelling of 20402221403 in words is "twenty billion, four hundred two million, two hundred twenty-one thousand, four hundred three".