20458742 has 16 divisors (see below), whose sum is σ = 31430592. Its totient is φ = 9984000.

The previous prime is 20458741. The next prime is 20458747. The reversal of 20458742 is 24785402.

It is a junction number, because it is equal to n+sod(n) for n = 20458699 and 20458708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20458741) by changing a digit.

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, 26867 + ... + 27617.

It is an arithmetic number, because the mean of its divisors is an integer number (1964412).

Almost surely, 2^20458742 is an apocalyptic number.

20458742 is a deficient number, since it is larger than the sum of its proper divisors (10971850).

20458742 is a wasteful number, since it uses less digits than its factorization.

20458742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 20458742 is about 4523.1340904289. The cubic root of 20458742 is about 273.5014554966.

The spelling of 20458742 in words is "twenty million, four hundred fifty-eight thousand, seven hundred forty-two".