20297497 has 8 divisors (see below), whose sum is σ = 22741632. Its totient is φ = 17953200.

The previous prime is 20297483. The next prime is 20297527. The reversal of 20297497 is 79479202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20297497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20297437) 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, 24529 + ... + 25342.

It is an arithmetic number, because the mean of its divisors is an integer number (2842704).

Almost surely, 2^20297497 is an apocalyptic number.

It is an amenable number.

20297497 is a deficient number, since it is larger than the sum of its proper divisors (2444135).

20297497 is a wasteful number, since it uses less digits than its factorization.

20297497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49919.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 20297497 is about 4505.2743534662. The cubic root of 20297497 is about 272.7810281480.

The spelling of 20297497 in words is "twenty million, two hundred ninety-seven thousand, four hundred ninety-seven".