20355000 has 160 divisors (see below), whose sum is σ = 67478400. Its totient is φ = 5104000.

The previous prime is 20354993. The next prime is 20355011. The reversal of 20355000 is 55302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 344971 + ... + 345029.

It is an arithmetic number, because the mean of its divisors is an integer number (421740).

Almost surely, 2^20355000 is an apocalyptic number.

20355000 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 20355000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33739200).

20355000 is an abundant number, since it is smaller than the sum of its proper divisors (47123400).

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

20355000 is a wasteful number, since it uses less digits than its factorization.

20355000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 20355000 is about 4511.6515822922. The cubic root of 20355000 is about 273.0383823451.

The spelling of 20355000 in words is "twenty million, three hundred fifty-five thousand".