20007925909 has 2 divisors, whose sum is σ = 20007925910. Its totient is φ = 20007925908.

The previous prime is 20007925901. The next prime is 20007925919. The reversal of 20007925909 is 90952970002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17769689809 + 2238236100 = 133303^2 + 47310^2 .

It is a cyclic number.

It is not a de Polignac number, because 20007925909 - 2³ = 20007925901 is a prime.

It is a super-3 number, since 3×20007925909³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20007925901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10003962954 + 10003962955.

It is an arithmetic number, because the mean of its divisors is an integer number (10003962955).

Almost surely, 2^20007925909 is an apocalyptic number.

It is an amenable number.

20007925909 is a deficient number, since it is larger than the sum of its proper divisors (1).

20007925909 is an equidigital number, since it uses as much as digits as its factorization.

20007925909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 20007925909 in words is "twenty billion, seven million, nine hundred twenty-five thousand, nine hundred nine".