20742262 has 16 divisors (see below), whose sum is σ = 33243840. Its totient is φ = 9677448.

The previous prime is 20742247. The next prime is 20742299. The reversal of 20742262 is 26224702.

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, 1528 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (2077740).

Almost surely, 2^20742262 is an apocalyptic number.

20742262 is a deficient number, since it is larger than the sum of its proper divisors (12501578).

20742262 is a wasteful number, since it uses less digits than its factorization.

20742262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8235.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20742262 is about 4554.3673545291. The cubic root of 20742262 is about 274.7590705243.

Adding to 20742262 its reverse (26224702), we get a palindrome (46966964).

The spelling of 20742262 in words is "twenty million, seven hundred forty-two thousand, two hundred sixty-two".