20236556461 has 8 divisors (see below), whose sum is σ = 23238151200. Its totient is φ = 17428613040.

The previous prime is 20236556453. The next prime is 20236556477. The reversal of 20236556461 is 16465563202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20236556461 - 2³ = 20236556453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236556491) 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, 48412606 + ... + 48413023.

It is an arithmetic number, because the mean of its divisors is an integer number (2904768900).

Almost surely, 2^20236556461 is an apocalyptic number.

It is an amenable number.

20236556461 is a deficient number, since it is larger than the sum of its proper divisors (3001594739).

20236556461 is a wasteful number, since it uses less digits than its factorization.

20236556461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96825659.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 20236556461 in words is "twenty billion, two hundred thirty-six million, five hundred fifty-six thousand, four hundred sixty-one".