20312000 has 56 divisors (see below), whose sum is σ = 50322480. Its totient is φ = 8121600.

The previous prime is 20311981. The next prime is 20312021. The reversal of 20312000 is 21302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6731 + ... + 9269.

Almost surely, 2^20312000 is an apocalyptic number.

20312000 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 20312000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25161240).

20312000 is an abundant number, since it is smaller than the sum of its proper divisors (30010480).

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

20312000 is an equidigital number, since it uses as much as digits as its factorization.

20312000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2546 counting only the distinct ones).

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

The square root of 20312000 is about 4506.8836239690. The cubic root of 20312000 is about 272.8459819923.

Adding to 20312000 its reverse (21302), we get a palindrome (20333302).

The spelling of 20312000 in words is "twenty million, three hundred twelve thousand".