20802293 has 8 divisors (see below), whose sum is σ = 21390936. Its totient is φ = 20217600.

The previous prime is 20802277. The next prime is 20802307. The reversal of 20802293 is 39220802.

It can be written as a sum of positive squares in 4 ways, for example, as 208849 + 20593444 = 457^2 + 4538^2 .

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 20802293 - 2⁴ = 20802277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802233) 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, 12023 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (2673867).

Almost surely, 2^20802293 is an apocalyptic number.

It is an amenable number.

20802293 is a deficient number, since it is larger than the sum of its proper divisors (588643).

20802293 is a wasteful number, since it uses less digits than its factorization.

20802293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20802293 is about 4560.9530802235. The cubic root of 20802293 is about 275.0238789182.

The spelling of 20802293 in words is "twenty million, eight hundred two thousand, two hundred ninety-three".