20414666221 has 2 divisors, whose sum is σ = 20414666222. Its totient is φ = 20414666220.

The previous prime is 20414666161. The next prime is 20414666273. The reversal of 20414666221 is 12266641402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18039176100 + 2375490121 = 134310^2 + 48739^2 .

It is a cyclic number.

It is not a de Polignac number, because 20414666221 - 2⁷ = 20414666093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20414666021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207333110 + 10207333111.

It is an arithmetic number, because the mean of its divisors is an integer number (10207333111).

Almost surely, 2^20414666221 is an apocalyptic number.

It is an amenable number.

20414666221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20414666221 is an equidigital number, since it uses as much as digits as its factorization.

20414666221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 20414666221 in words is "twenty billion, four hundred fourteen million, six hundred sixty-six thousand, two hundred twenty-one".