20452993 has 12 divisors (see below), whose sum is σ = 23010064. Its totient is φ = 18156600.

The previous prime is 20452981. The next prime is 20452997. The reversal of 20452993 is 39925402.

It is a de Polignac number, because none of the positive numbers 2^k-20452993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20452997) 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, 3238 + ... + 7168.

Almost surely, 2^20452993 is an apocalyptic number.

It is an amenable number.

20452993 is a deficient number, since it is larger than the sum of its proper divisors (2557071).

20452993 is a wasteful number, since it uses less digits than its factorization.

20452993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996 (or 3985 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 20452993 is about 4522.4985351020. The cubic root of 20452993 is about 273.4758347103.

The spelling of 20452993 in words is "twenty million, four hundred fifty-two thousand, nine hundred ninety-three".