20109124939 has 2 divisors, whose sum is σ = 20109124940. Its totient is φ = 20109124938.

The previous prime is 20109124927. The next prime is 20109124949. The reversal of 20109124939 is 93942190102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20109124939 - 2⁵ = 20109124907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20109124949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054562469 + 10054562470.

It is an arithmetic number, because the mean of its divisors is an integer number (10054562470).

Almost surely, 2^20109124939 is an apocalyptic number.

20109124939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109124939 is an equidigital number, since it uses as much as digits as its factorization.

20109124939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 20109124939 in words is "twenty billion, one hundred nine million, one hundred twenty-four thousand, nine hundred thirty-nine".