20102105407 has 2 divisors, whose sum is σ = 20102105408. Its totient is φ = 20102105406.

The previous prime is 20102105399. The next prime is 20102105459. The reversal of 20102105407 is 70450120102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102105407 - 2³ = 20102105399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20106105407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051052703 + 10051052704.

It is an arithmetic number, because the mean of its divisors is an integer number (10051052704).

Almost surely, 2^20102105407 is an apocalyptic number.

20102105407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102105407 is an equidigital number, since it uses as much as digits as its factorization.

20102105407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

Adding to 20102105407 its reverse (70450120102), we get a palindrome (90552225509).

The spelling of 20102105407 in words is "twenty billion, one hundred two million, one hundred five thousand, four hundred seven".