20824136971 has 8 divisors (see below), whose sum is σ = 23912884800. Its totient is φ = 17934663240.

The previous prime is 20824136947. The next prime is 20824136989. The reversal of 20824136971 is 17963142802.

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 20824136971 - 2³¹ = 18676653323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20824136941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49818301 + ... + 49818718.

It is an arithmetic number, because the mean of its divisors is an integer number (2989110600).

Almost surely, 2^20824136971 is an apocalyptic number.

20824136971 is a deficient number, since it is larger than the sum of its proper divisors (3088747829).

20824136971 is a wasteful number, since it uses less digits than its factorization.

20824136971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99637049.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 20824136971 in words is "twenty billion, eight hundred twenty-four million, one hundred thirty-six thousand, nine hundred seventy-one".