20611425641 has 2 divisors, whose sum is σ = 20611425642. Its totient is φ = 20611425640.

The previous prime is 20611425629. The next prime is 20611425677. The reversal of 20611425641 is 14652411602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20592250000 + 19175641 = 143500^2 + 4379^2 .

It is a cyclic number.

It is not a de Polignac number, because 20611425641 - 2¹⁸ = 20611163497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20611425598 and 20611425607.

It is not a weakly prime, because it can be changed into another prime (20611425841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10305712820 + 10305712821.

It is an arithmetic number, because the mean of its divisors is an integer number (10305712821).

Almost surely, 2^20611425641 is an apocalyptic number.

It is an amenable number.

20611425641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20611425641 is an equidigital number, since it uses as much as digits as its factorization.

20611425641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 20611425641 in words is "twenty billion, six hundred eleven million, four hundred twenty-five thousand, six hundred forty-one".