20881293 has 8 divisors (see below), whose sum is σ = 28112448. Its totient is φ = 13785504.

The previous prime is 20881271. The next prime is 20881297. The reversal of 20881293 is 39218802.

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

It is not a de Polignac number, because 20881293 - 2⁶ = 20881229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20881297) 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, 33480 + ... + 34097.

It is an arithmetic number, because the mean of its divisors is an integer number (3514056).

Almost surely, 2^20881293 is an apocalyptic number.

It is an amenable number.

20881293 is a deficient number, since it is larger than the sum of its proper divisors (7231155).

20881293 is a wasteful number, since it uses less digits than its factorization.

20881293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67683.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20881293 is about 4569.6053440095. The cubic root of 20881293 is about 275.3715880314.

The spelling of 20881293 in words is "twenty million, eight hundred eighty-one thousand, two hundred ninety-three".