20180742 has 8 divisors (see below), whose sum is σ = 40361496. Its totient is φ = 6726912.

The previous prime is 20180737. The next prime is 20180747. The reversal of 20180742 is 24708102.

It is an interprime number because it is at equal distance from previous prime (20180737) and next prime (20180747).

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

20180742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20180747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1681723 + ... + 1681734.

It is an arithmetic number, because the mean of its divisors is an integer number (5045187).

Almost surely, 2^20180742 is an apocalyptic number.

20180742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20180742 is a wasteful number, since it uses less digits than its factorization.

20180742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363462.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20180742 is about 4492.2980755956. The cubic root of 20180742 is about 272.2569929085.

Adding to 20180742 its reverse (24708102), we get a palindrome (44888844).

The spelling of 20180742 in words is "twenty million, one hundred eighty thousand, seven hundred forty-two".