20723342 has 16 divisors (see below), whose sum is σ = 32270400. Its totient is φ = 9969120.

The previous prime is 20723317. The next prime is 20723393. The reversal of 20723342 is 24332702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24584 + ... + 25412.

It is an arithmetic number, because the mean of its divisors is an integer number (2016900).

Almost surely, 2^20723342 is an apocalyptic number.

20723342 is a deficient number, since it is larger than the sum of its proper divisors (11547058).

20723342 is a wasteful number, since it uses less digits than its factorization.

20723342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 20723342 is about 4552.2897535197. The cubic root of 20723342 is about 274.6755048554.

The spelling of 20723342 in words is "twenty million, seven hundred twenty-three thousand, three hundred forty-two".