20312621611 has 2 divisors, whose sum is σ = 20312621612. Its totient is φ = 20312621610.

The previous prime is 20312621597. The next prime is 20312621621. The reversal of 20312621611 is 11612621302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20312621611 - 2⁵ = 20312621579 is a prime.

It is not a weakly prime, because it can be changed into another prime (20312621621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156310805 + 10156310806.

It is an arithmetic number, because the mean of its divisors is an integer number (10156310806).

Almost surely, 2^20312621611 is an apocalyptic number.

20312621611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312621611 is an equidigital number, since it uses as much as digits as its factorization.

20312621611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 20312621611 in words is "twenty billion, three hundred twelve million, six hundred twenty-one thousand, six hundred eleven".