20754111472561 has 8 divisors (see below), whose sum is σ = 21232674440064. Its totient is φ = 20280722159040.

The previous prime is 20754111472519. The next prime is 20754111472579. The reversal of 20754111472561 is 16527411145702.

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 20754111472561 - 2³⁵ = 20719751734193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20754111475561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293405381 + ... + 1293421426.

It is an arithmetic number, because the mean of its divisors is an integer number (2654084305008).

Almost surely, 2^{20754111472561} is an apocalyptic number.

It is an amenable number.

20754111472561 is a deficient number, since it is larger than the sum of its proper divisors (478562967503).

20754111472561 is a wasteful number, since it uses less digits than its factorization.

20754111472561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586826991.

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 20754111472561 in words is "twenty trillion, seven hundred fifty-four billion, one hundred eleven million, four hundred seventy-two thousand, five hundred sixty-one".