20803864704 has 256 divisors, whose sum is σ = 64738894080. Its totient is φ = 5796790272.

The previous prime is 20803864691. The next prime is 20803864717. The reversal of 20803864704 is 40746830802.

It is an interprime number because it is at equal distance from previous prime (20803864691) and next prime (20803864717).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19033182 + ... + 19034274.

It is an arithmetic number, because the mean of its divisors is an integer number (252886305).

Almost surely, 2^20803864704 is an apocalyptic number.

20803864704 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 20803864704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32369447040).

20803864704 is an abundant number, since it is smaller than the sum of its proper divisors (43935029376).

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

20803864704 is a wasteful number, since it uses less digits than its factorization.

20803864704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 20803864704 in words is "twenty billion, eight hundred three million, eight hundred sixty-four thousand, seven hundred four".