20150243 has 4 divisors (see below), whose sum is σ = 20181480. Its totient is φ = 20119008.

The previous prime is 20150233. The next prime is 20150257. The reversal of 20150243 is 34205102.

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

It is a cyclic number.

It is not a de Polignac number, because 20150243 - 2⁴ = 20150227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20150233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14630 + ... + 15947.

It is an arithmetic number, because the mean of its divisors is an integer number (5045370).

Almost surely, 2^20150243 is an apocalyptic number.

20150243 is a deficient number, since it is larger than the sum of its proper divisors (31237).

20150243 is an equidigital number, since it uses as much as digits as its factorization.

20150243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31236.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20150243 is about 4488.9022043257. The cubic root of 20150243 is about 272.1197704584.

Adding to 20150243 its reverse (34205102), we get a palindrome (54355345).

The spelling of 20150243 in words is "twenty million, one hundred fifty thousand, two hundred forty-three".