20142542 has 8 divisors (see below), whose sum is σ = 34530096. Its totient is φ = 8632512.

The previous prime is 20142517. The next prime is 20142547. The reversal of 20142542 is 24524102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142547) 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, 719363 + ... + 719390.

It is an arithmetic number, because the mean of its divisors is an integer number (4316262).

Almost surely, 2^20142542 is an apocalyptic number.

20142542 is a deficient number, since it is larger than the sum of its proper divisors (14387554).

20142542 is a wasteful number, since it uses less digits than its factorization.

20142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438762.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 20142542 is about 4488.0443402444. The cubic root of 20142542 is about 272.0850998861.

Adding to 20142542 its reverse (24524102), we get a palindrome (44666644).

The spelling of 20142542 in words is "twenty million, one hundred forty-two thousand, five hundred forty-two".