20242431149 has 2 divisors, whose sum is σ = 20242431150. Its totient is φ = 20242431148.

The previous prime is 20242431107. The next prime is 20242431161. The reversal of 20242431149 is 94113424202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15315795049 + 4926636100 = 123757^2 + 70190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20242431149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20242431049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121215574 + 10121215575.

It is an arithmetic number, because the mean of its divisors is an integer number (10121215575).

Almost surely, 2^20242431149 is an apocalyptic number.

It is an amenable number.

20242431149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20242431149 is an equidigital number, since it uses as much as digits as its factorization.

20242431149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 20242431149 in words is "twenty billion, two hundred forty-two million, four hundred thirty-one thousand, one hundred forty-nine".