20893930 has 8 divisors (see below), whose sum is σ = 37609092. Its totient is φ = 8357568.

The previous prime is 20893927. The next prime is 20893931. The reversal of 20893930 is 3939802.

It can be written as a sum of positive squares in 2 ways, for example, as 20711601 + 182329 = 4551^2 + 427^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20893931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044687 + ... + 1044706.

Almost surely, 2^20893930 is an apocalyptic number.

20893930 is a deficient number, since it is larger than the sum of its proper divisors (16715162).

20893930 is a wasteful number, since it uses less digits than its factorization.

20893930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089400.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 20893930 is about 4570.9878582206. The cubic root of 20893930 is about 275.4271268815.

The spelling of 20893930 in words is "twenty million, eight hundred ninety-three thousand, nine hundred thirty".