20200742 has 8 divisors (see below), whose sum is σ = 31120176. Its totient is φ = 9827352.

The previous prime is 20200729. The next prime is 20200751. The reversal of 20200742 is 24700202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20200742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136418 + ... + 136565.

It is an arithmetic number, because the mean of its divisors is an integer number (3890022).

Almost surely, 2^20200742 is an apocalyptic number.

20200742 is a deficient number, since it is larger than the sum of its proper divisors (10919434).

20200742 is a wasteful number, since it uses less digits than its factorization.

20200742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273022.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 20200742 is about 4494.5235565074. The cubic root of 20200742 is about 272.3469027518.

Adding to 20200742 its reverse (24700202), we get a palindrome (44900944).

The spelling of 20200742 in words is "twenty million, two hundred thousand, seven hundred forty-two".