20456698511 has 2 divisors, whose sum is σ = 20456698512. Its totient is φ = 20456698510.

The previous prime is 20456698489. The next prime is 20456698573. The reversal of 20456698511 is 11589665402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20456698511 - 2²² = 20452504207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20456698211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228349255 + 10228349256.

It is an arithmetic number, because the mean of its divisors is an integer number (10228349256).

Almost surely, 2^20456698511 is an apocalyptic number.

20456698511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20456698511 is an equidigital number, since it uses as much as digits as its factorization.

20456698511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 20456698511 in words is "twenty billion, four hundred fifty-six million, six hundred ninety-eight thousand, five hundred eleven".