20145498 has 16 divisors (see below), whose sum is σ = 40339296. Its totient is φ = 6707120.

The previous prime is 20145487. The next prime is 20145509. The reversal of 20145498 is 89454102.

It is an interprime number because it is at equal distance from previous prime (20145487) and next prime (20145509).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5665 + ... + 8507.

It is an arithmetic number, because the mean of its divisors is an integer number (2521206).

Almost surely, 2^20145498 is an apocalyptic number.

20145498 is an abundant number, since it is smaller than the sum of its proper divisors (20193798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20145498 is a wasteful number, since it uses less digits than its factorization.

20145498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20145498 is about 4488.3736475476. The cubic root of 20145498 is about 272.0984091002.

The spelling of 20145498 in words is "twenty million, one hundred forty-five thousand, four hundred ninety-eight".