20155350321 has 24 divisors (see below), whose sum is σ = 30071658240. Its totient is φ = 12995128800.

The previous prime is 20155350287. The next prime is 20155350323. The reversal of 20155350321 is 12305355102.

It is a happy number.

20155350321 is a `hidden beast` number, since 2 + 0 + 155 + 3 + 503 + 2 + 1 = 666.

It is not a de Polignac number, because 20155350321 - 2²² = 20151156017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20155350323) 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 23 ways as a sum of consecutive naturals, for example, 429391 + ... + 474011.

It is an arithmetic number, because the mean of its divisors is an integer number (1252985760).

Almost surely, 2^20155350321 is an apocalyptic number.

It is an amenable number.

20155350321 is a deficient number, since it is larger than the sum of its proper divisors (9916307919).

20155350321 is a wasteful number, since it uses less digits than its factorization.

20155350321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46277 (or 46274 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 20155350321 in words is "twenty billion, one hundred fifty-five million, three hundred fifty thousand, three hundred twenty-one".