20012310 has 48 divisors (see below), whose sum is σ = 52313040. Its totient is φ = 5307840.

The previous prime is 20012303. The next prime is 20012341. The reversal of 20012310 is 1321002.

It is a happy number.

It is a super-2 number, since 2×20012310² = 800985103072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20012292 and 20012301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20125 + ... + 21095.

It is an arithmetic number, because the mean of its divisors is an integer number (1089855).

Almost surely, 2^20012310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26156520).

20012310 is an abundant number, since it is smaller than the sum of its proper divisors (32300730).

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

20012310 is a wasteful number, since it uses less digits than its factorization.

20012310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20012310 is about 4473.5120431267. The cubic root of 20012310 is about 271.4974410389.

Adding to 20012310 its reverse (1321002), we get a palindrome (21333312).

The spelling of 20012310 in words is "twenty million, twelve thousand, three hundred ten".