20453806 has 4 divisors (see below), whose sum is σ = 30680712. Its totient is φ = 10226902.

The previous prime is 20453777. The next prime is 20453809. The reversal of 20453806 is 60835402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5113450 + ... + 5113453.

It is an arithmetic number, because the mean of its divisors is an integer number (7670178).

Almost surely, 2^20453806 is an apocalyptic number.

20453806 is a deficient number, since it is larger than the sum of its proper divisors (10226906).

20453806 is a wasteful number, since it uses less digits than its factorization.

20453806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226905.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20453806 is about 4522.5884181517. The cubic root of 20453806 is about 273.4794581882.

The spelling of 20453806 in words is "twenty million, four hundred fifty-three thousand, eight hundred six".