20841996824 has 16 divisors (see below), whose sum is σ = 42631357320. Its totient is φ = 9473634880.

The previous prime is 20841996823. The next prime is 20841996829. The reversal of 20841996824 is 42869914802.

It is a happy number.

It is a super-2 number, since 2×20841996824² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20841996823) 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, 118420349 + ... + 118420524.

Almost surely, 2^20841996824 is an apocalyptic number.

It is an amenable number.

20841996824 is an abundant number, since it is smaller than the sum of its proper divisors (21789360496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20841996824 is a wasteful number, since it uses less digits than its factorization.

20841996824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236840890 (or 236840886 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 20841996824 in words is "twenty billion, eight hundred forty-one million, nine hundred ninety-six thousand, eight hundred twenty-four".