20994868224 has 220 divisors, whose sum is σ = 68397278928. Its totient is φ = 6361804800.

The previous prime is 20994868201. The next prime is 20994868231. The reversal of 20994868224 is 42286849902.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 900879 + ... + 923889.

Almost surely, 2^20994868224 is an apocalyptic number.

20994868224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20994868224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34198639464).

20994868224 is an abundant number, since it is smaller than the sum of its proper divisors (47402410704).

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

20994868224 is a wasteful number, since it uses less digits than its factorization.

20994868224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23054 (or 23027 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 20994868224 in words is "twenty billion, nine hundred ninety-four million, eight hundred sixty-eight thousand, two hundred twenty-four".