20544621007 has 2 divisors, whose sum is σ = 20544621008. Its totient is φ = 20544621006.

The previous prime is 20544620977. The next prime is 20544621011. The reversal of 20544621007 is 70012644502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20544621007 - 2⁷ = 20544620879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20544621007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20544628007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272310503 + 10272310504.

It is an arithmetic number, because the mean of its divisors is an integer number (10272310504).

Almost surely, 2^20544621007 is an apocalyptic number.

20544621007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20544621007 is an equidigital number, since it uses as much as digits as its factorization.

20544621007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 20544621007 in words is "twenty billion, five hundred forty-four million, six hundred twenty-one thousand, seven".