20072743 has 8 divisors (see below), whose sum is σ = 20655648. Its totient is φ = 19497504.

The previous prime is 20072729. The next prime is 20072747. The reversal of 20072743 is 34727002.

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 20072743 - 2⁵ = 20072711 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621 + ... + 7297.

It is an arithmetic number, because the mean of its divisors is an integer number (2581956).

Almost surely, 2^20072743 is an apocalyptic number.

20072743 is a deficient number, since it is larger than the sum of its proper divisors (582905).

20072743 is a wasteful number, since it uses less digits than its factorization.

20072743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20072743 is about 4480.2614879045. The cubic root of 20072743 is about 271.7704549465.

Adding to 20072743 its reverse (34727002), we get a palindrome (54799745).

The spelling of 20072743 in words is "twenty million, seventy-two thousand, seven hundred forty-three".