20266342055 has 4 divisors (see below), whose sum is σ = 24319610472. Its totient is φ = 16213073640.

The previous prime is 20266342051. The next prime is 20266342067. The reversal of 20266342055 is 55024366202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20266342055 - 2² = 20266342051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266342051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2026634201 + ... + 2026634210.

It is an arithmetic number, because the mean of its divisors is an integer number (6079902618).

Almost surely, 2^20266342055 is an apocalyptic number.

20266342055 is a deficient number, since it is larger than the sum of its proper divisors (4053268417).

20266342055 is an equidigital number, since it uses as much as digits as its factorization.

20266342055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053268416.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 20266342055 in words is "twenty billion, two hundred sixty-six million, three hundred forty-two thousand, fifty-five".