20551310427 has 8 divisors (see below), whose sum is σ = 27515448400. Its totient is φ = 13644023040.

The previous prime is 20551310411. The next prime is 20551310443. The reversal of 20551310427 is 72401315502.

It is an interprime number because it is at equal distance from previous prime (20551310411) and next prime (20551310443).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20551310427 - 2⁴ = 20551310411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20551310394 and 20551310403.

It is not an unprimeable number, because it can be changed into a prime (20551310447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14211802 + ... + 14213247.

It is an arithmetic number, because the mean of its divisors is an integer number (3439431050).

Almost surely, 2^20551310427 is an apocalyptic number.

20551310427 is a deficient number, since it is larger than the sum of its proper divisors (6964137973).

20551310427 is a wasteful number, since it uses less digits than its factorization.

20551310427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28425293.

The product of its (nonzero) digits is 8400, while the sum is 30.

Adding to 20551310427 its reverse (72401315502), we get a palindrome (92952625929).

The spelling of 20551310427 in words is "twenty billion, five hundred fifty-one million, three hundred ten thousand, four hundred twenty-seven".