20621112107 has 2 divisors, whose sum is σ = 20621112108. Its totient is φ = 20621112106.

The previous prime is 20621112067. The next prime is 20621112143. The reversal of 20621112107 is 70121112602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20621112107 - 2²⁰ = 20620063531 is a prime.

It is not a weakly prime, because it can be changed into another prime (20621112307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310556053 + 10310556054.

It is an arithmetic number, because the mean of its divisors is an integer number (10310556054).

Almost surely, 2^20621112107 is an apocalyptic number.

20621112107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20621112107 is an equidigital number, since it uses as much as digits as its factorization.

20621112107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 20621112107 its reverse (70121112602), we get a palindrome (90742224709).

The spelling of 20621112107 in words is "twenty billion, six hundred twenty-one million, one hundred twelve thousand, one hundred seven".