20815755834083 has 4 divisors (see below), whose sum is σ = 23789435238960. Its totient is φ = 17842076429208.

The previous prime is 20815755834079. The next prime is 20815755834113. The reversal of 20815755834083 is 38043855751802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20815755834083 - 2² = 20815755834079 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20815755834023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1486839702428 + ... + 1486839702441.

It is an arithmetic number, because the mean of its divisors is an integer number (5947358809740).

Almost surely, 2^{20815755834083} is an apocalyptic number.

20815755834083 is a deficient number, since it is larger than the sum of its proper divisors (2973679404877).

20815755834083 is an equidigital number, since it uses as much as digits as its factorization.

20815755834083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973679404876.

The product of its (nonzero) digits is 32256000, while the sum is 59.

The spelling of 20815755834083 in words is "twenty trillion, eight hundred fifteen billion, seven hundred fifty-five million, eight hundred thirty-four thousand, eighty-three".