20355678000 has 800 divisors, whose sum is σ = 85608419520. Its totient is φ = 4623091200.

The previous prime is 20355677989. The next prime is 20355678001. The reversal of 20355678000 is 87655302.

20355678000 is a `hidden beast` number, since 20 + 3 + 556 + 7 + 80 + 0 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20355678001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 129653922 + ... + 129654078.

Almost surely, 2^20355678000 is an apocalyptic number.

20355678000 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 20355678000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42804209760).

20355678000 is an abundant number, since it is smaller than the sum of its proper divisors (65252741520).

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

20355678000 is an equidigital number, since it uses as much as digits as its factorization.

20355678000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20355678000 in words is "twenty billion, three hundred fifty-five million, six hundred seventy-eight thousand".