20297499 has 8 divisors (see below), whose sum is σ = 27090000. Its totient is φ = 13518336.

The previous prime is 20297483. The next prime is 20297527. The reversal of 20297499 is 99479202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20297499 - 2⁴ = 20297483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20297499.

It is not an unprimeable number, because it can be changed into a prime (20297479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (3386250).

Almost surely, 2^20297499 is an apocalyptic number.

20297499 is a deficient number, since it is larger than the sum of its proper divisors (6792501).

20297499 is a wasteful number, since it uses less digits than its factorization.

20297499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 20297499 is about 4505.2745754282. The cubic root of 20297499 is about 272.7810371075.

The spelling of 20297499 in words is "twenty million, two hundred ninety-seven thousand, four hundred ninety-nine".