20545623907 has 2 divisors, whose sum is σ = 20545623908. Its totient is φ = 20545623906.

The previous prime is 20545623869. The next prime is 20545623941. The reversal of 20545623907 is 70932654502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20545623907 - 2³¹ = 18398140259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20545623407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272811953 + 10272811954.

It is an arithmetic number, because the mean of its divisors is an integer number (10272811954).

Almost surely, 2^20545623907 is an apocalyptic number.

20545623907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545623907 is an equidigital number, since it uses as much as digits as its factorization.

20545623907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 20545623907 in words is "twenty billion, five hundred forty-five million, six hundred twenty-three thousand, nine hundred seven".