20256132427 has 8 divisors (see below), whose sum is σ = 21775910400. Its totient is φ = 18781721064.

The previous prime is 20256132409. The next prime is 20256132431. The reversal of 20256132427 is 72423165202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20256132427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20256132392 and 20256132401.

It is not an unprimeable number, because it can be changed into a prime (20256132497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11340727 + ... + 11342512.

It is an arithmetic number, because the mean of its divisors is an integer number (2721988800).

Almost surely, 2^20256132427 is an apocalyptic number.

20256132427 is a deficient number, since it is larger than the sum of its proper divisors (1519777973).

20256132427 is a wasteful number, since it uses less digits than its factorization.

20256132427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22683305.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 20256132427 its reverse (72423165202), we get a palindrome (92679297629).

The spelling of 20256132427 in words is "twenty billion, two hundred fifty-six million, one hundred thirty-two thousand, four hundred twenty-seven".