20453706 has 48 divisors (see below), whose sum is σ = 54547584. Its totient is φ = 5393952.

The previous prime is 20453701. The next prime is 20453717. The reversal of 20453706 is 60735402.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20453706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4606 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (1136408).

Almost surely, 2^20453706 is an apocalyptic number.

20453706 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20453706 is an abundant number, since it is smaller than the sum of its proper divisors (34093878).

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

20453706 is a wasteful number, since it uses less digits than its factorization.

20453706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12515 (or 12512 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20453706 is about 4522.5773625224. The cubic root of 20453706 is about 273.4790125012.

The spelling of 20453706 in words is "twenty million, four hundred fifty-three thousand, seven hundred six".