20675743 has 8 divisors (see below), whose sum is σ = 23742720. Its totient is φ = 17806680.

The previous prime is 20675737. The next prime is 20675747. The reversal of 20675743 is 34757602.

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 20675743 - 2²¹ = 18578591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20675699 and 20675708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49255 + ... + 49672.

It is an arithmetic number, because the mean of its divisors is an integer number (2967840).

Almost surely, 2^20675743 is an apocalyptic number.

20675743 is a deficient number, since it is larger than the sum of its proper divisors (3066977).

20675743 is a wasteful number, since it uses less digits than its factorization.

20675743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98957.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20675743 is about 4547.0587196560. The cubic root of 20675743 is about 274.4650448797.

The spelling of 20675743 in words is "twenty million, six hundred seventy-five thousand, seven hundred forty-three".