20297670 has 16 divisors (see below), whose sum is σ = 48714480. Its totient is φ = 5412704.

The previous prime is 20297663. The next prime is 20297671. The reversal of 20297670 is 7679202.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297671) 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, 338265 + ... + 338324.

It is an arithmetic number, because the mean of its divisors is an integer number (3044655).

Almost surely, 2^20297670 is an apocalyptic number.

20297670 is an abundant number, since it is smaller than the sum of its proper divisors (28416810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20297670 is a wasteful number, since it uses less digits than its factorization.

20297670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676599.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 20297670 is about 4505.2935531439. The cubic root of 20297670 is about 272.7818031366.

The spelling of 20297670 in words is "twenty million, two hundred ninety-seven thousand, six hundred seventy".