20071442 has 4 divisors (see below), whose sum is σ = 30107166. Its totient is φ = 10035720.

The previous prime is 20071417. The next prime is 20071481. The reversal of 20071442 is 24417002.

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., 10896601 + 9174841 = 3301^2 + 3029^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5017859 + ... + 5017862.

Almost surely, 2^20071442 is an apocalyptic number.

20071442 is a deficient number, since it is larger than the sum of its proper divisors (10035724).

20071442 is a wasteful number, since it uses less digits than its factorization.

20071442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035723.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20071442 is about 4480.1162931335. The cubic root of 20071442 is about 271.7645832860.

Adding to 20071442 its reverse (24417002), we get a palindrome (44488444).

It can be divided in two parts, 200 and 71442, that multiplied together give a square (14288400 = 3780²).

The spelling of 20071442 in words is "twenty million, seventy-one thousand, four hundred forty-two".