20307000 has 128 divisors (see below), whose sum is σ = 72483840. Its totient is φ = 4636800.

The previous prime is 20306987. The next prime is 20307037. The reversal of 20307000 is 70302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20517 + ... + 21483.

It is an arithmetic number, because the mean of its divisors is an integer number (566280).

Almost surely, 2^20307000 is an apocalyptic number.

20307000 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 20307000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36241920).

20307000 is an abundant number, since it is smaller than the sum of its proper divisors (52176840).

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

20307000 is a wasteful number, since it uses less digits than its factorization.

20307000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 12.

The square root of 20307000 is about 4506.3288828047. The cubic root of 20307000 is about 272.8235922413.

Adding to 20307000 its reverse (70302), we get a palindrome (20377302).

The spelling of 20307000 in words is "twenty million, three hundred seven thousand".