20501888855205 has 8 divisors (see below), whose sum is σ = 32803022168352. Its totient is φ = 10934340722768.

The previous prime is 20501888855197. The next prime is 20501888855249. The reversal of 20501888855205 is 50255888810502.

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 20501888855205 - 2³ = 20501888855197 is a prime.

It is a super-3 number, since 3×20501888855205³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683396295159 + ... + 683396295188.

It is an arithmetic number, because the mean of its divisors is an integer number (4100377771044).

Almost surely, 2^{20501888855205} is an apocalyptic number.

It is an amenable number.

20501888855205 is a deficient number, since it is larger than the sum of its proper divisors (12301133313147).

20501888855205 is a wasteful number, since it uses less digits than its factorization.

20501888855205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366792590355.

The product of its (nonzero) digits is 10240000, while the sum is 57.

The spelling of 20501888855205 in words is "twenty trillion, five hundred one billion, eight hundred eighty-eight million, eight hundred fifty-five thousand, two hundred five".