20551065463 has 2 divisors, whose sum is σ = 20551065464. Its totient is φ = 20551065462.

The previous prime is 20551065439. The next prime is 20551065473. The reversal of 20551065463 is 36456015502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20551065463 - 2⁹ = 20551064951 is a prime.

It is a super-2 number, since 2×20551065463² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20551065433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275532731 + 10275532732.

It is an arithmetic number, because the mean of its divisors is an integer number (10275532732).

Almost surely, 2^20551065463 is an apocalyptic number.

20551065463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20551065463 is an equidigital number, since it uses as much as digits as its factorization.

20551065463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20551065463 in words is "twenty billion, five hundred fifty-one million, sixty-five thousand, four hundred sixty-three".