20709854400 has 336 divisors, whose sum is σ = 71115448320. Its totient is φ = 5270937600.

The previous prime is 20709854383. The next prime is 20709854449. The reversal of 20709854400 is 445890702.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9248481 + ... + 9250719.

It is an arithmetic number, because the mean of its divisors is an integer number (211653120).

Almost surely, 2^20709854400 is an apocalyptic number.

20709854400 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 20709854400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35557724160).

20709854400 is an abundant number, since it is smaller than the sum of its proper divisors (50405593920).

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

20709854400 is a wasteful number, since it uses less digits than its factorization.

20709854400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352 (or 2337 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 20709854400 in words is "twenty billion, seven hundred nine million, eight hundred fifty-four thousand, four hundred".