20997514 has 8 divisors (see below), whose sum is σ = 31530240. Its totient is φ = 10487436.

The previous prime is 20997511. The next prime is 20997517. The reversal of 20997514 is 41579902.

It is an interprime number because it is at equal distance from previous prime (20997511) and next prime (20997517).

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

It is not an unprimeable number, because it can be changed into a prime (20997511) 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, 3114 + ... + 7189.

It is an arithmetic number, because the mean of its divisors is an integer number (3941280).

Almost surely, 2^20997514 is an apocalyptic number.

20997514 is a deficient number, since it is larger than the sum of its proper divisors (10532726).

20997514 is a wasteful number, since it uses less digits than its factorization.

20997514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11324.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 20997514 is about 4582.3044420902. The cubic root of 20997514 is about 275.8815304061.

The spelling of 20997514 in words is "twenty million, nine hundred ninety-seven thousand, five hundred fourteen".