20426613325551 has 48 divisors (see below), whose sum is σ = 30301419019872. Its totient is φ = 13251940070400.

The previous prime is 20426613325523. The next prime is 20426613325553. The reversal of 20426613325551 is 15552331662402.

20426613325551 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 6 + 61 + 3 + 32 + 5 + 551 = 666.

It is not a de Polignac number, because 20426613325551 - 2⁵ = 20426613325519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20426613325497 and 20426613325506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426613325553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245055141 + ... + 245138481.

It is an arithmetic number, because the mean of its divisors is an integer number (631279562914).

Almost surely, 2^{20426613325551} is an apocalyptic number.

20426613325551 is a deficient number, since it is larger than the sum of its proper divisors (9874805694321).

20426613325551 is a wasteful number, since it uses less digits than its factorization.

20426613325551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85064 (or 85061 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

Adding to 20426613325551 its reverse (15552331662402), we get a palindrome (35978944987953).

The spelling of 20426613325551 in words is "twenty trillion, four hundred twenty-six billion, six hundred thirteen million, three hundred twenty-five thousand, five hundred fifty-one".