20453051 has 4 divisors (see below), whose sum is σ = 20469792. Its totient is φ = 20436312.

The previous prime is 20453047. The next prime is 20453053. The reversal of 20453051 is 15035402.

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

It is a cyclic number.

It is not a de Polignac number, because 20453051 - 2² = 20453047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20453053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6380 + ... + 9033.

It is an arithmetic number, because the mean of its divisors is an integer number (5117448).

Almost surely, 2^20453051 is an apocalyptic number.

20453051 is a deficient number, since it is larger than the sum of its proper divisors (16741).

20453051 is a wasteful number, since it uses less digits than its factorization.

20453051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16740.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20453051 is about 4522.5049474821. The cubic root of 20453051 is about 273.4760932150.

Adding to 20453051 its reverse (15035402), we get a palindrome (35488453).

The spelling of 20453051 in words is "twenty million, four hundred fifty-three thousand, fifty-one".