20690120107 has 2 divisors, whose sum is σ = 20690120108. Its totient is φ = 20690120106.

The previous prime is 20690120081. The next prime is 20690120123. The reversal of 20690120107 is 70102109602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20690120107 is a prime.

It is not a weakly prime, because it can be changed into another prime (20690120807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10345060053 + 10345060054.

It is an arithmetic number, because the mean of its divisors is an integer number (10345060054).

Almost surely, 2^20690120107 is an apocalyptic number.

20690120107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20690120107 is an equidigital number, since it uses as much as digits as its factorization.

20690120107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

Adding to 20690120107 its reverse (70102109602), we get a palindrome (90792229709).

The spelling of 20690120107 in words is "twenty billion, six hundred ninety million, one hundred twenty thousand, one hundred seven".