20551426267 has 2 divisors, whose sum is σ = 20551426268. Its totient is φ = 20551426266.

The previous prime is 20551426253. The next prime is 20551426289. The reversal of 20551426267 is 76262415502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20551426267 is a prime.

It is a super-2 number, since 2×20551426267² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20551426237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275713133 + 10275713134.

It is an arithmetic number, because the mean of its divisors is an integer number (10275713134).

Almost surely, 2^20551426267 is an apocalyptic number.

20551426267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20551426267 is an equidigital number, since it uses as much as digits as its factorization.

20551426267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 20551426267 in words is "twenty billion, five hundred fifty-one million, four hundred twenty-six thousand, two hundred sixty-seven".