20297559 has 8 divisors (see below), whose sum is σ = 27119232. Its totient is φ = 13503800.

The previous prime is 20297539. The next prime is 20297587. The reversal of 20297559 is 95579202.

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

It is a cyclic number.

It is not a de Polignac number, because 20297559 - 2⁵ = 20297527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297539) 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, 5217 + ... + 8234.

It is an arithmetic number, because the mean of its divisors is an integer number (3389904).

Almost surely, 2^20297559 is an apocalyptic number.

20297559 is a deficient number, since it is larger than the sum of its proper divisors (6821673).

20297559 is a wasteful number, since it uses less digits than its factorization.

20297559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13957.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 20297559 is about 4505.2812342849. The cubic root of 20297559 is about 272.7813058901.

The spelling of 20297559 in words is "twenty million, two hundred ninety-seven thousand, five hundred fifty-nine".