20243975 has 6 divisors (see below), whose sum is σ = 25102560. Its totient is φ = 16195160.

The previous prime is 20243969. The next prime is 20243989. The reversal of 20243975 is 57934202.

It is a happy number.

It is not a de Polignac number, because 20243975 - 2⁴ = 20243959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404855 + ... + 404904.

It is an arithmetic number, because the mean of its divisors is an integer number (4183760).

Almost surely, 2^20243975 is an apocalyptic number.

20243975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20243975 is a deficient number, since it is larger than the sum of its proper divisors (4858585).

20243975 is an equidigital number, since it uses as much as digits as its factorization.

20243975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809769 (or 809764 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20243975 is about 4499.3305057531. The cubic root of 20243975 is about 272.5410537704.

The spelling of 20243975 in words is "twenty million, two hundred forty-three thousand, nine hundred seventy-five".