20263442 has 4 divisors (see below), whose sum is σ = 30395166. Its totient is φ = 10131720.

The previous prime is 20263433. The next prime is 20263447. The reversal of 20263442 is 24436202.

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., 11015761 + 9247681 = 3319^2 + 3041^2 .

It is not an unprimeable number, because it can be changed into a prime (20263447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065859 + ... + 5065862.

Almost surely, 2^20263442 is an apocalyptic number.

20263442 is a deficient number, since it is larger than the sum of its proper divisors (10131724).

20263442 is a wasteful number, since it uses less digits than its factorization.

20263442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10131723.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 20263442 is about 4501.4933077813. The cubic root of 20263442 is about 272.6283860418.

Adding to 20263442 its reverse (24436202), we get a palindrome (44699644).

The spelling of 20263442 in words is "twenty million, two hundred sixty-three thousand, four hundred forty-two".