20461023465143 has 4 divisors (see below), whose sum is σ = 20463218156808. Its totient is φ = 20458828773480.

The previous prime is 20461023465139. The next prime is 20461023465191. The reversal of 20461023465143 is 34156432016402.

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 20461023465143 - 2² = 20461023465139 is a prime.

It is a super-2 number, since 2×20461023465143² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20461023465143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461023461143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097331848 + ... + 1097350493.

It is an arithmetic number, because the mean of its divisors is an integer number (5115804539202).

Almost surely, 2^{20461023465143} is an apocalyptic number.

20461023465143 is a deficient number, since it is larger than the sum of its proper divisors (2194691665).

20461023465143 is an equidigital number, since it uses as much as digits as its factorization.

20461023465143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194691664.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20461023465143 in words is "twenty trillion, four hundred sixty-one billion, twenty-three million, four hundred sixty-five thousand, one hundred forty-three".