20907552089 has 2 divisors, whose sum is σ = 20907552090. Its totient is φ = 20907552088.

The previous prime is 20907552047. The next prime is 20907552103. The reversal of 20907552089 is 98025570902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19100622025 + 1806930064 = 138205^2 + 42508^2 .

It is a cyclic number.

It is not a de Polignac number, because 20907552089 - 2¹⁶ = 20907486553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20907551089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10453776044 + 10453776045.

It is an arithmetic number, because the mean of its divisors is an integer number (10453776045).

Almost surely, 2^20907552089 is an apocalyptic number.

It is an amenable number.

20907552089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20907552089 is an equidigital number, since it uses as much as digits as its factorization.

20907552089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 20907552089 in words is "twenty billion, nine hundred seven million, five hundred fifty-two thousand, eighty-nine".