20655220128754 has 8 divisors (see below), whose sum is σ = 31058582835420. Its totient is φ = 10302359183616.

The previous prime is 20655220128727. The next prime is 20655220128761. The reversal of 20655220128754 is 45782102255602.

It can be written as a sum of positive squares in 2 ways, for example, as 17249294513529 + 3405925615225 = 4153227^2 + 1845515^2 .

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

It is a super-5 number, since 5×20655220128754⁵ (a number of 68 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20655220128698 and 20655220128707.

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, 12625439359 + ... + 12625440994.

Almost surely, 2^{20655220128754} is an apocalyptic number.

20655220128754 is a deficient number, since it is larger than the sum of its proper divisors (10403362706666).

20655220128754 is a wasteful number, since it uses less digits than its factorization.

20655220128754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25250880764.

The product of its (nonzero) digits is 2688000, while the sum is 49.

The spelling of 20655220128754 in words is "twenty trillion, six hundred fifty-five billion, two hundred twenty million, one hundred twenty-eight thousand, seven hundred fifty-four".