20870268843 has 4 divisors (see below), whose sum is σ = 27827025128. Its totient is φ = 13913512560.

The previous prime is 20870268829. The next prime is 20870268863. The reversal of 20870268843 is 34886207802.

It is a happy number.

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

It is not a de Polignac number, because 20870268843 - 2⁶ = 20870268779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20870268792 and 20870268801.

It is not an unprimeable number, because it can be changed into a prime (20870268823) 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, 3478378138 + ... + 3478378143.

It is an arithmetic number, because the mean of its divisors is an integer number (6956756282).

Almost surely, 2^20870268843 is an apocalyptic number.

20870268843 is a deficient number, since it is larger than the sum of its proper divisors (6956756285).

20870268843 is an equidigital number, since it uses as much as digits as its factorization.

20870268843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6956756284.

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 20870268843 in words is "twenty billion, eight hundred seventy million, two hundred sixty-eight thousand, eight hundred forty-three".