20799823680 has 896 divisors, whose sum is σ = 83428392960. Its totient is φ = 4849827840.

The previous prime is 20799823669. The next prime is 20799823711. The reversal of 20799823680 is 8632899702.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 158777215 + ... + 158777345.

Almost surely, 2^20799823680 is an apocalyptic number.

20799823680 is a gapful number since it is divisible by the number (20) 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 20799823680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41714196480).

20799823680 is an abundant number, since it is smaller than the sum of its proper divisors (62628569280).

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

20799823680 is a wasteful number, since it uses less digits than its factorization.

20799823680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 20799823680 in words is "twenty billion, seven hundred ninety-nine million, eight hundred twenty-three thousand, six hundred eighty".