20555415353121 has 8 divisors (see below), whose sum is σ = 29898785968224. Its totient is φ = 12457827486720.

The previous prime is 20555415353117. The next prime is 20555415353219. The reversal of 20555415353121 is 12135351455502.

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

It is not a de Polignac number, because 20555415353121 - 2² = 20555415353117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20555415354121) 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, 311445687136 + ... + 311445687201.

It is an arithmetic number, because the mean of its divisors is an integer number (3737348246028).

Almost surely, 2^{20555415353121} is an apocalyptic number.

It is an amenable number.

20555415353121 is a deficient number, since it is larger than the sum of its proper divisors (9343370615103).

20555415353121 is a wasteful number, since it uses less digits than its factorization.

20555415353121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622891374351.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 20555415353121 in words is "twenty trillion, five hundred fifty-five billion, four hundred fifteen million, three hundred fifty-three thousand, one hundred twenty-one".