20298499 has 4 divisors (see below), whose sum is σ = 21859936. Its totient is φ = 18737064.

The previous prime is 20298469. The next prime is 20298503. The reversal of 20298499 is 99489202.

It is a happy number.

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 20298499 - 2⁷ = 20298371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20298449) 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, 780699 + ... + 780724.

It is an arithmetic number, because the mean of its divisors is an integer number (5464984).

Almost surely, 2^20298499 is an apocalyptic number.

20298499 is a deficient number, since it is larger than the sum of its proper divisors (1561437).

20298499 is a wasteful number, since it uses less digits than its factorization.

20298499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561436.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 20298499 is about 4505.3855550885. The cubic root of 20298499 is about 272.7855167490.

The spelling of 20298499 in words is "twenty million, two hundred ninety-eight thousand, four hundred ninety-nine".