20124750949 has 2 divisors, whose sum is σ = 20124750950. Its totient is φ = 20124750948.

The previous prime is 20124750917. The next prime is 20124750973. The reversal of 20124750949 is 94905742102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20122841025 + 1909924 = 141855^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124750949 - 2⁵ = 20124750917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20124750649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062375474 + 10062375475.

It is an arithmetic number, because the mean of its divisors is an integer number (10062375475).

Almost surely, 2^20124750949 is an apocalyptic number.

It is an amenable number.

20124750949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124750949 is an equidigital number, since it uses as much as digits as its factorization.

20124750949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 20124750949 in words is "twenty billion, one hundred twenty-four million, seven hundred fifty thousand, nine hundred forty-nine".