20442111149 has 2 divisors, whose sum is σ = 20442111150. Its totient is φ = 20442111148.

The previous prime is 20442111133. The next prime is 20442111161. The reversal of 20442111149 is 94111124402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19500726025 + 941385124 = 139645^2 + 30682^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442111149 - 2⁴ = 20442111133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442161149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221055574 + 10221055575.

It is an arithmetic number, because the mean of its divisors is an integer number (10221055575).

Almost surely, 2^20442111149 is an apocalyptic number.

It is an amenable number.

20442111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442111149 is an equidigital number, since it uses as much as digits as its factorization.

20442111149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 20442111149 in words is "twenty billion, four hundred forty-two million, one hundred eleven thousand, one hundred forty-nine".