20740442 has 16 divisors (see below), whose sum is σ = 33644160. Its totient is φ = 9551808.

The previous prime is 20740441. The next prime is 20740463. The reversal of 20740442 is 24404702.

It is not an unprimeable number, because it can be changed into a prime (20740441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4892 + ... + 8087.

It is an arithmetic number, because the mean of its divisors is an integer number (2102760).

Almost surely, 2^20740442 is an apocalyptic number.

20740442 is a deficient number, since it is larger than the sum of its proper divisors (12903718).

20740442 is a wasteful number, since it uses less digits than its factorization.

20740442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13045.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 20740442 is about 4554.1675419334. The cubic root of 20740442 is about 274.7510341759.

The spelling of 20740442 in words is "twenty million, seven hundred forty thousand, four hundred forty-two".