20862831471 has 4 divisors (see below), whose sum is σ = 27817108632. Its totient is φ = 13908554312.

The previous prime is 20862831463. The next prime is 20862831499. The reversal of 20862831471 is 17413826802.

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 20862831471 - 2³ = 20862831463 is a prime.

It is a super-3 number, since 3×20862831471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20862831371) 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, 3477138576 + ... + 3477138581.

It is an arithmetic number, because the mean of its divisors is an integer number (6954277158).

Almost surely, 2^20862831471 is an apocalyptic number.

20862831471 is a deficient number, since it is larger than the sum of its proper divisors (6954277161).

20862831471 is an equidigital number, since it uses as much as digits as its factorization.

20862831471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954277160.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 20862831471 in words is "twenty billion, eight hundred sixty-two million, eight hundred thirty-one thousand, four hundred seventy-one".