20045499 has 24 divisors (see below), whose sum is σ = 29313360. Its totient is φ = 12142080.

The previous prime is 20045497. The next prime is 20045507. The reversal of 20045499 is 99454002.

It is not a de Polignac number, because 20045499 - 2¹ = 20045497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20045497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48807 + ... + 49215.

It is an arithmetic number, because the mean of its divisors is an integer number (1221390).

Almost surely, 2^20045499 is an apocalyptic number.

20045499 is a deficient number, since it is larger than the sum of its proper divisors (9267861).

20045499 is a wasteful number, since it uses less digits than its factorization.

20045499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20045499 is about 4477.2200079960. The cubic root of 20045499 is about 271.6474445774.

It can be divided in two parts, 2004 and 5499, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 20045499 in words is "twenty million, forty-five thousand, four hundred ninety-nine".