20923587042261 has 8 divisors (see below), whose sum is σ = 28006669038144. Its totient is φ = 13894781537280.

The previous prime is 20923587042157. The next prime is 20923587042271. The reversal of 20923587042261 is 16224078532902.

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

It is not a de Polignac number, because 20923587042261 - 2³⁴ = 20906407173077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923587042271) 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, 13569121825 + ... + 13569123366.

It is an arithmetic number, because the mean of its divisors is an integer number (3500833629768).

It is a 1-persistent number, because it is pandigital, but 2⋅20923587042261 = 41847174084522 is not.

Almost surely, 2^{20923587042261} is an apocalyptic number.

It is an amenable number.

20923587042261 is a deficient number, since it is larger than the sum of its proper divisors (7083081995883).

20923587042261 is a wasteful number, since it uses less digits than its factorization.

20923587042261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27138245451.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 20923587042261 in words is "twenty trillion, nine hundred twenty-three billion, five hundred eighty-seven million, forty-two thousand, two hundred sixty-one".