20742673 has 8 divisors (see below), whose sum is σ = 23941440. Its totient is φ = 17602800.

The previous prime is 20742653. The next prime is 20742677. The reversal of 20742673 is 37624702.

It is a happy number.

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 20742673 - 2¹⁷ = 20611601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20742677) 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, 13963 + ... + 15376.

It is an arithmetic number, because the mean of its divisors is an integer number (2992680).

Almost surely, 2^20742673 is an apocalyptic number.

It is an amenable number.

20742673 is a deficient number, since it is larger than the sum of its proper divisors (3198767).

20742673 is a wasteful number, since it uses less digits than its factorization.

20742673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29447.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20742673 is about 4554.4124758304. The cubic root of 20742673 is about 274.7608852610.

The spelling of 20742673 in words is "twenty million, seven hundred forty-two thousand, six hundred seventy-three".