20207370109 has 2 divisors, whose sum is σ = 20207370110. Its totient is φ = 20207370108.

The previous prime is 20207370103. The next prime is 20207370179. The reversal of 20207370109 is 90107370202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15098265625 + 5109104484 = 122875^2 + 71478^2 .

It is a cyclic number.

It is not a de Polignac number, because 20207370109 - 2⁹ = 20207369597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20207370103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103685054 + 10103685055.

It is an arithmetic number, because the mean of its divisors is an integer number (10103685055).

Almost surely, 2^20207370109 is an apocalyptic number.

It is an amenable number.

20207370109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20207370109 is an equidigital number, since it uses as much as digits as its factorization.

20207370109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The spelling of 20207370109 in words is "twenty billion, two hundred seven million, three hundred seventy thousand, one hundred nine".