20297930 has 8 divisors (see below), whose sum is σ = 36536292. Its totient is φ = 8119168.

The previous prime is 20297903. The next prime is 20297969. The reversal of 20297930 is 3979202.

It can be written as a sum of positive squares in 2 ways, for example, as 19351201 + 946729 = 4399^2 + 973^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014887 + ... + 1014906.

Almost surely, 2^20297930 is an apocalyptic number.

20297930 is a deficient number, since it is larger than the sum of its proper divisors (16238362).

20297930 is a wasteful number, since it uses less digits than its factorization.

20297930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029800.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 20297930 is about 4505.3224079970. The cubic root of 20297930 is about 272.7829678510.

The spelling of 20297930 in words is "twenty million, two hundred ninety-seven thousand, nine hundred thirty".