20600000 has 84 divisors (see below), whose sum is σ = 51590448. Its totient is φ = 8160000.

The previous prime is 20599993. The next prime is 20600003. The reversal of 20600000 is 602.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (20600003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199949 + ... + 200051.

It is an arithmetic number, because the mean of its divisors is an integer number (614172).

Almost surely, 2^20600000 is an apocalyptic number.

20600000 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 20600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25795224).

20600000 is an abundant number, since it is smaller than the sum of its proper divisors (30990448).

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

20600000 is an frugal number, since it uses more digits than its factorization.

20600000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 20600000 is about 4538.7222871641. The cubic root of 20600000 is about 274.1294786493.

Adding to 20600000 its reverse (602), we get a palindrome (20600602).

The spelling of 20600000 in words is "twenty million, six hundred thousand".