20012406 has 16 divisors (see below), whose sum is σ = 40341504. Its totient is φ = 6618024.

The previous prime is 20012401. The next prime is 20012411. The reversal of 20012406 is 60421002.

It is an interprime number because it is at equal distance from previous prime (20012401) and next prime (20012411).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12370 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (2521344).

Almost surely, 2^20012406 is an apocalyptic number.

20012406 is an abundant number, since it is smaller than the sum of its proper divisors (20329098).

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

20012406 is a wasteful number, since it uses less digits than its factorization.

20012406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26395.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20012406 is about 4473.5227729386. The cubic root of 20012406 is about 271.4978751669.

Adding to 20012406 its reverse (60421002), we get a palindrome (80433408).

The spelling of 20012406 in words is "twenty million, twelve thousand, four hundred six".