20823969895 has 8 divisors (see below), whose sum is σ = 25231373856. Its totient is φ = 16497435936.

The previous prime is 20823969869. The next prime is 20823969949. The reversal of 20823969895 is 59896932802.

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

It is a cyclic number.

It is not a de Polignac number, because 20823969895 - 2¹¹ = 20823967847 is a prime.

It is a super-2 number, since 2×20823969895² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20216932 + ... + 20217961.

It is an arithmetic number, because the mean of its divisors is an integer number (3153921732).

Almost surely, 2^20823969895 is an apocalyptic number.

20823969895 is a deficient number, since it is larger than the sum of its proper divisors (4407403961).

20823969895 is a wasteful number, since it uses less digits than its factorization.

20823969895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40435001.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 20823969895 in words is "twenty billion, eight hundred twenty-three million, nine hundred sixty-nine thousand, eight hundred ninety-five".