20555046121 has 8 divisors (see below), whose sum is σ = 20709015264. Its totient is φ = 20401134240.

The previous prime is 20555046107. The next prime is 20555046133. The reversal of 20555046121 is 12164055502.

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 20555046121 - 2⁷ = 20555045993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555046151) 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, 944266 + ... + 965788.

It is an arithmetic number, because the mean of its divisors is an integer number (2588626908).

Almost surely, 2^20555046121 is an apocalyptic number.

It is an amenable number.

20555046121 is a deficient number, since it is larger than the sum of its proper divisors (153969143).

20555046121 is a wasteful number, since it uses less digits than its factorization.

20555046121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28631.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 20555046121 in words is "twenty billion, five hundred fifty-five million, forty-six thousand, one hundred twenty-one".