20783347200 has 1440 divisors, whose sum is σ = 97178780160. Its totient is φ = 4257792000.

The previous prime is 20783347199. The next prime is 20783347217. The reversal of 20783347200 is 274338702.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 292723165 + ... + 292723235.

It is an arithmetic number, because the mean of its divisors is an integer number (67485264).

Almost surely, 2^20783347200 is an apocalyptic number.

20783347200 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 20783347200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48589390080).

20783347200 is an abundant number, since it is smaller than the sum of its proper divisors (76395432960).

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

20783347200 is a wasteful number, since it uses less digits than its factorization.

20783347200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 20783347200 in words is "twenty billion, seven hundred eighty-three million, three hundred forty-seven thousand, two hundred".