20245051 has 4 divisors (see below), whose sum is σ = 21310600. Its totient is φ = 19179504.

The previous prime is 20245019. The next prime is 20245061. The reversal of 20245051 is 15054202.

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 20245051 - 2⁵ = 20245019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1065529 = 20245051 / (2 + 0 + 2 + 4 + 5 + 0 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20245061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532746 + ... + 532783.

It is an arithmetic number, because the mean of its divisors is an integer number (5327650).

Almost surely, 2^20245051 is an apocalyptic number.

20245051 is a deficient number, since it is larger than the sum of its proper divisors (1065549).

20245051 is a wasteful number, since it uses less digits than its factorization.

20245051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065548.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20245051 is about 4499.4500775095. The cubic root of 20245051 is about 272.5458823507.

Adding to 20245051 its reverse (15054202), we get a palindrome (35299253).

The spelling of 20245051 in words is "twenty million, two hundred forty-five thousand, fifty-one".