20412306 has 24 divisors (see below), whose sum is σ = 44326620. Its totient is φ = 6788736.

The previous prime is 20412277. The next prime is 20412319. The reversal of 20412306 is 60321402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20331081 + 81225 = 4509^2 + 285^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9246 + ... + 11238.

Almost surely, 2^20412306 is an apocalyptic number.

20412306 is an abundant number, since it is smaller than the sum of its proper divisors (23914314).

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

20412306 is a wasteful number, since it uses less digits than its factorization.

20412306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570 (or 2567 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20412306 is about 4517.9980079677. The cubic root of 20412306 is about 273.2943731237.

Adding to 20412306 its sum of digits (18), we get a square (20412324 = 4518²).

Adding to 20412306 its reverse (60321402), we get a palindrome (80733708).

The spelling of 20412306 in words is "twenty million, four hundred twelve thousand, three hundred six".