20861841224 has 32 divisors (see below), whose sum is σ = 44709309120. Its totient is φ = 8939716416.

The previous prime is 20861841223. The next prime is 20861841229. The reversal of 20861841224 is 42214816802.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20861841223) 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, 603842 + ... + 637454.

It is an arithmetic number, because the mean of its divisors is an integer number (1397165910).

Almost surely, 2^20861841224 is an apocalyptic number.

It is an amenable number.

20861841224 is an abundant number, since it is smaller than the sum of its proper divisors (23847467896).

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

20861841224 is a wasteful number, since it uses less digits than its factorization.

20861841224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44709 (or 44705 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The spelling of 20861841224 in words is "twenty billion, eight hundred sixty-one million, eight hundred forty-one thousand, two hundred twenty-four".