20590000 has 100 divisors (see below), whose sum is σ = 52295760. Its totient is φ = 7840000.

The previous prime is 20589979. The next prime is 20590027. The reversal of 20590000 is 9502.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 289965 + ... + 290035.

Almost surely, 2^20590000 is an apocalyptic number.

20590000 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 20590000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26147880).

20590000 is an abundant number, since it is smaller than the sum of its proper divisors (31705760).

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

20590000 is an equidigital number, since it uses as much as digits as its factorization.

20590000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 20590000 is about 4537.6205218154. The cubic root of 20590000 is about 274.0851139490.

Adding to 20590000 its reverse (9502), we get a palindrome (20599502).

The spelling of 20590000 in words is "twenty million, five hundred ninety thousand".