20253993 has 8 divisors (see below), whose sum is σ = 27046656. Its totient is φ = 13482000.

The previous prime is 20253979. The next prime is 20254009. The reversal of 20253993 is 39935202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20253993 - 2⁶ = 20253929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20253973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2713 + ... + 6918.

It is an arithmetic number, because the mean of its divisors is an integer number (3380832).

Almost surely, 2^20253993 is an apocalyptic number.

It is an amenable number.

20253993 is a deficient number, since it is larger than the sum of its proper divisors (6792663).

20253993 is an equidigital number, since it uses as much as digits as its factorization.

20253993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10335.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 20253993 is about 4500.4436447977. The cubic root of 20253993 is about 272.5860032104.

The spelling of 20253993 in words is "twenty million, two hundred fifty-three thousand, nine hundred ninety-three".