20487693 has 8 divisors (see below), whose sum is σ = 27373248. Its totient is φ = 13630304.

The previous prime is 20487673. The next prime is 20487697. The reversal of 20487693 is 39678402.

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 20487693 - 2¹² = 20483597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487697) 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, 5280 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (3421656).

Almost surely, 2^20487693 is an apocalyptic number.

It is an amenable number.

20487693 is a deficient number, since it is larger than the sum of its proper divisors (6885555).

20487693 is a wasteful number, since it uses less digits than its factorization.

20487693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14083.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20487693 is about 4526.3332842379. Note that the first 3 decimals coincide. The cubic root of 20487693 is about 273.6304045885.

The spelling of 20487693 in words is "twenty million, four hundred eighty-seven thousand, six hundred ninety-three".