20042735 has 8 divisors (see below), whose sum is σ = 24213600. Its totient is φ = 15925984.

The previous prime is 20042731. The next prime is 20042747. The reversal of 20042735 is 53724002.

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

It is a cyclic number.

It is not a de Polignac number, because 20042735 - 2² = 20042731 is a prime.

It is a super-2 number, since 2×20042735² = 803422452560450, which contains 22 as substring.

20042735 is a modest number, since divided by 42735 gives 20 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20042735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042731) 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, 12707 + ... + 14196.

It is an arithmetic number, because the mean of its divisors is an integer number (3026700).

Almost surely, 2^20042735 is an apocalyptic number.

20042735 is a deficient number, since it is larger than the sum of its proper divisors (4170865).

20042735 is a wasteful number, since it uses less digits than its factorization.

20042735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27057.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20042735 is about 4476.9113236695. The cubic root of 20042735 is about 271.6349585150.

Adding to 20042735 its reverse (53724002), we get a palindrome (73766737).

The spelling of 20042735 in words is "twenty million, forty-two thousand, seven hundred thirty-five".