20643876555154 has 8 divisors (see below), whose sum is σ = 30999955755888. Its totient is φ = 10310557969860.

The previous prime is 20643876555109. The next prime is 20643876555173. The reversal of 20643876555154 is 45155567834602.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20643876555092 and 20643876555101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5690151592 + ... + 5690155219.

It is an arithmetic number, because the mean of its divisors is an integer number (3874994469486).

Almost surely, 2^{20643876555154} is an apocalyptic number.

20643876555154 is a deficient number, since it is larger than the sum of its proper divisors (10356079200734).

20643876555154 is a wasteful number, since it uses less digits than its factorization.

20643876555154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11380307720.

The product of its (nonzero) digits is 120960000, while the sum is 61.

The spelling of 20643876555154 in words is "twenty trillion, six hundred forty-three billion, eight hundred seventy-six million, five hundred fifty-five thousand, one hundred fifty-four".