20045299 has 4 divisors (see below), whose sum is σ = 20203264. Its totient is φ = 19887336.

The previous prime is 20045297. The next prime is 20045303. The reversal of 20045299 is 99254002.

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 20045299 - 2¹ = 20045297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20045299.

It is not an unprimeable number, because it can be changed into a prime (20045297) 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, 78792 + ... + 79045.

It is an arithmetic number, because the mean of its divisors is an integer number (5050816).

Almost surely, 2^20045299 is an apocalyptic number.

20045299 is a deficient number, since it is larger than the sum of its proper divisors (157965).

20045299 is a wasteful number, since it uses less digits than its factorization.

20045299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157964.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20045299 is about 4477.1976726519. The cubic root of 20045299 is about 271.6465411381.

The spelling of 20045299 in words is "twenty million, forty-five thousand, two hundred ninety-nine".