20735016800 has 72 divisors (see below), whose sum is σ = 50639477616. Its totient is φ = 8290711040.

The previous prime is 20735016763. The next prime is 20735016803. The reversal of 20735016800 is 861053702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20735016803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3495437 + ... + 3501363.

It is an arithmetic number, because the mean of its divisors is an integer number (703326078).

Almost surely, 2^20735016800 is an apocalyptic number.

20735016800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20735016800 is an abundant number, since it is smaller than the sum of its proper divisors (29904460816).

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

20735016800 is a wasteful number, since it uses less digits than its factorization.

20735016800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320 (or 10307 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 20735016800 in words is "twenty billion, seven hundred thirty-five million, sixteen thousand, eight hundred".