20089693 has 4 divisors (see below), whose sum is σ = 21635068. Its totient is φ = 18544320.

The previous prime is 20089691. The next prime is 20089697. The reversal of 20089693 is 39698002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3090564 + 16999129 = 1758^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 20089693 - 2¹ = 20089691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20089691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772668 + ... + 772693.

It is an arithmetic number, because the mean of its divisors is an integer number (5408767).

Almost surely, 2^20089693 is an apocalyptic number.

It is an amenable number.

20089693 is a deficient number, since it is larger than the sum of its proper divisors (1545375).

20089693 is a wasteful number, since it uses less digits than its factorization.

20089693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545374.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20089693 is about 4482.1527193972. The cubic root of 20089693 is about 271.8469303473.

The spelling of 20089693 in words is "twenty million, eighty-nine thousand, six hundred ninety-three".