20593906 has 4 divisors (see below), whose sum is σ = 30890862. Its totient is φ = 10296952.

The previous prime is 20593883. The next prime is 20593907. The reversal of 20593906 is 60939502.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 16329681 + 4264225 = 4041^2 + 2065^2 .

It is not an unprimeable number, because it can be changed into a prime (20593907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5148475 + ... + 5148478.

Almost surely, 2^20593906 is an apocalyptic number.

20593906 is a deficient number, since it is larger than the sum of its proper divisors (10296956).

20593906 is a wasteful number, since it uses less digits than its factorization.

20593906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10296955.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 20593906 is about 4538.0509031962. The cubic root of 20593906 is about 274.1024445102.

The spelling of 20593906 in words is "twenty million, five hundred ninety-three thousand, nine hundred six".