20693386 has 24 divisors (see below), whose sum is σ = 38234916. Its totient is φ = 8346240.

The previous prime is 20693381. The next prime is 20693389. The reversal of 20693386 is 68339602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16769025 + 3924361 = 4095^2 + 1981^2 .

It is not an unprimeable number, because it can be changed into a prime (20693381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4545 + ... + 7876.

Almost surely, 2^20693386 is an apocalyptic number.

20693386 is a deficient number, since it is larger than the sum of its proper divisors (17541530).

20693386 is a wasteful number, since it uses less digits than its factorization.

20693386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12454 (or 12447 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 20693386 is about 4548.9983512857. The cubic root of 20693386 is about 274.5430914111.

The spelling of 20693386 in words is "twenty million, six hundred ninety-three thousand, three hundred eighty-six".