20453412 has 48 divisors (see below), whose sum is σ = 55480320. Its totient is φ = 5743392.

The previous prime is 20453401. The next prime is 20453437. The reversal of 20453412 is 21435402.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2893 + ... + 7019.

It is an arithmetic number, because the mean of its divisors is an integer number (1155840).

Almost surely, 2^20453412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20453412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27740160).

20453412 is an abundant number, since it is smaller than the sum of its proper divisors (35026908).

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

20453412 is a wasteful number, since it uses less digits than its factorization.

20453412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20453412 is about 4522.5448588157. The cubic root of 20453412 is about 273.4777021728.

Adding to 20453412 its reverse (21435402), we get a palindrome (41888814).

The spelling of 20453412 in words is "twenty million, four hundred fifty-three thousand, four hundred twelve".