20071542 has 16 divisors (see below), whose sum is σ = 40349232. Its totient is φ = 6656160.

The previous prime is 20071529. The next prime is 20071553. The reversal of 20071542 is 24517002.

It is a congruent number.

It is an unprimeable number.

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, 7309 + ... + 9672.

It is an arithmetic number, because the mean of its divisors is an integer number (2521827).

Almost surely, 2^20071542 is an apocalyptic number.

20071542 is an abundant number, since it is smaller than the sum of its proper divisors (20277690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20071542 is a wasteful number, since it uses less digits than its factorization.

20071542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17183.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20071542 is about 4480.1274535442. The cubic root of 20071542 is about 271.7650346140.

Adding to 20071542 its reverse (24517002), we get a palindrome (44588544).

The spelling of 20071542 in words is "twenty million, seventy-one thousand, five hundred forty-two".