20262142 has 4 divisors (see below), whose sum is σ = 30393216. Its totient is φ = 10131070.

The previous prime is 20262133. The next prime is 20262161. The reversal of 20262142 is 24126202.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065534 + ... + 5065537.

It is an arithmetic number, because the mean of its divisors is an integer number (7598304).

Almost surely, 2^20262142 is an apocalyptic number.

20262142 is a deficient number, since it is larger than the sum of its proper divisors (10131074).

20262142 is a wasteful number, since it uses less digits than its factorization.

20262142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10131073.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20262142 is about 4501.3489089383. The cubic root of 20262142 is about 272.6225557641.

Adding to 20262142 its reverse (24126202), we get a palindrome (44388344).

The spelling of 20262142 in words is "twenty million, two hundred sixty-two thousand, one hundred forty-two".