220705238407 has 2 divisors, whose sum is σ = 220705238408. Its totient is φ = 220705238406.

The previous prime is 220705238339. The next prime is 220705238423. The reversal of 220705238407 is 704832507022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220705238407 - 2¹¹ = 220705236359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220705238407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220705238107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110352619203 + 110352619204.

It is an arithmetic number, because the mean of its divisors is an integer number (110352619204).

Almost surely, 2^220705238407 is an apocalyptic number.

220705238407 is a deficient number, since it is larger than the sum of its proper divisors (1).

220705238407 is an equidigital number, since it uses as much as digits as its factorization.

220705238407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 220705238407 in words is "two hundred twenty billion, seven hundred five million, two hundred thirty-eight thousand, four hundred seven".