20355470111 has 2 divisors, whose sum is σ = 20355470112. Its totient is φ = 20355470110.

The previous prime is 20355470099. The next prime is 20355470153. The reversal of 20355470111 is 11107455302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20355470111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20355470711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177735055 + 10177735056.

It is an arithmetic number, because the mean of its divisors is an integer number (10177735056).

Almost surely, 2^20355470111 is an apocalyptic number.

20355470111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20355470111 is an equidigital number, since it uses as much as digits as its factorization.

20355470111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The spelling of 20355470111 in words is "twenty billion, three hundred fifty-five million, four hundred seventy thousand, one hundred eleven".