20120242 has 4 divisors (see below), whose sum is σ = 30180366. Its totient is φ = 10060120.

The previous prime is 20120237. The next prime is 20120251. The reversal of 20120242 is 24202102.

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., 13039321 + 7080921 = 3611^2 + 2661^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030059 + ... + 5030062.

Almost surely, 2^20120242 is an apocalyptic number.

20120242 is a deficient number, since it is larger than the sum of its proper divisors (10060124).

20120242 is a wasteful number, since it uses less digits than its factorization.

20120242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060123.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20120242 is about 4485.5592739368. The cubic root of 20120242 is about 271.9846534738.

Adding to 20120242 its reverse (24202102), we get a palindrome (44322344).

The spelling of 20120242 in words is "twenty million, one hundred twenty thousand, two hundred forty-two".