20890293 has 8 divisors (see below), whose sum is σ = 27937728. Its totient is φ = 13884864.

The previous prime is 20890283. The next prime is 20890301. The reversal of 20890293 is 39209802.

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

It is not a de Polignac number, because 20890293 - 2⁴ = 20890277 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20890213) 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, 9321 + ... + 11342.

It is an arithmetic number, because the mean of its divisors is an integer number (3492216).

Almost surely, 2^20890293 is an apocalyptic number.

It is an amenable number.

20890293 is a deficient number, since it is larger than the sum of its proper divisors (7047435).

20890293 is a wasteful number, since it uses less digits than its factorization.

20890293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21003.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20890293 is about 4570.5900056776. The cubic root of 20890293 is about 275.4111447823.

The spelling of 20890293 in words is "twenty million, eight hundred ninety thousand, two hundred ninety-three".