20657988059 has 2 divisors, whose sum is σ = 20657988060. Its totient is φ = 20657988058.

The previous prime is 20657987969. The next prime is 20657988079. The reversal of 20657988059 is 95088975602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20657988059 - 2¹² = 20657983963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20657987989 and 20657988007.

It is not a weakly prime, because it can be changed into another prime (20657988079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10328994029 + 10328994030.

It is an arithmetic number, because the mean of its divisors is an integer number (10328994030).

Almost surely, 2^20657988059 is an apocalyptic number.

20657988059 is a deficient number, since it is larger than the sum of its proper divisors (1).

20657988059 is an equidigital number, since it uses as much as digits as its factorization.

20657988059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 20657988059 in words is "twenty billion, six hundred fifty-seven million, nine hundred eighty-eight thousand, fifty-nine".