20654146427 has 4 divisors (see below), whose sum is σ = 20654543496. Its totient is φ = 20653749360.

The previous prime is 20654146423. The next prime is 20654146439. The reversal of 20654146427 is 72464145602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72464145602 = 2 ⋅36232072801.

It is a cyclic number.

It is not a de Polignac number, because 20654146427 - 2² = 20654146423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20654146421) 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 in 3 ways as a sum of consecutive naturals, for example, 106193 + ... + 229314.

It is an arithmetic number, because the mean of its divisors is an integer number (5163635874).

Almost surely, 2^20654146427 is an apocalyptic number.

20654146427 is a deficient number, since it is larger than the sum of its proper divisors (397069).

20654146427 is an equidigital number, since it uses as much as digits as its factorization.

20654146427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397068.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 20654146427 in words is "twenty billion, six hundred fifty-four million, one hundred forty-six thousand, four hundred twenty-seven".