20245049 has 4 divisors (see below), whose sum is σ = 22085520. Its totient is φ = 18404580.

The previous prime is 20245019. The next prime is 20245061. The reversal of 20245049 is 94054202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20245049 - 2⁸ = 20244793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20245019) 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, 920219 + ... + 920240.

It is an arithmetic number, because the mean of its divisors is an integer number (5521380).

Almost surely, 2^20245049 is an apocalyptic number.

It is an amenable number.

20245049 is a deficient number, since it is larger than the sum of its proper divisors (1840471).

20245049 is a wasteful number, since it uses less digits than its factorization.

20245049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840470.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20245049 is about 4499.4498552601. The cubic root of 20245049 is about 272.5458733758.

The spelling of 20245049 in words is "twenty million, two hundred forty-five thousand, forty-nine".