20878371800 has 192 divisors, whose sum is σ = 57183840000. Its totient is φ = 6989068800.

The previous prime is 20878371781. The next prime is 20878371827. The reversal of 20878371800 is 817387802.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13927451 + ... + 13928949.

It is an arithmetic number, because the mean of its divisors is an integer number (297832500).

Almost surely, 2^20878371800 is an apocalyptic number.

20878371800 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 20878371800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28591920000).

20878371800 is an abundant number, since it is smaller than the sum of its proper divisors (36305468200).

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

20878371800 is a wasteful number, since it uses less digits than its factorization.

20878371800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 20878371800 in words is "twenty billion, eight hundred seventy-eight million, three hundred seventy-one thousand, eight hundred".