20743724400 has 480 divisors, whose sum is σ = 80547606528. Its totient is φ = 4462387200.

The previous prime is 20743724387. The next prime is 20743724401. The reversal of 20743724400 is 442734702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20743724401) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9633724 + ... + 9635876.

Almost surely, 2^20743724400 is an apocalyptic number.

20743724400 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 20743724400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40273803264).

20743724400 is an abundant number, since it is smaller than the sum of its proper divisors (59803882128).

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

20743724400 is a wasteful number, since it uses less digits than its factorization.

20743724400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 33.

The spelling of 20743724400 in words is "twenty billion, seven hundred forty-three million, seven hundred twenty-four thousand, four hundred".