20221743 has 8 divisors (see below), whose sum is σ = 27104256. Its totient is φ = 13410200.

The previous prime is 20221727. The next prime is 20221753. The reversal of 20221743 is 34712202.

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 20221743 - 2⁴ = 20221727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221753) 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, 17073 + ... + 18218.

It is an arithmetic number, because the mean of its divisors is an integer number (3388032).

Almost surely, 2^20221743 is an apocalyptic number.

20221743 is a deficient number, since it is larger than the sum of its proper divisors (6882513).

20221743 is a wasteful number, since it uses less digits than its factorization.

20221743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35485.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20221743 is about 4496.8592372900. The cubic root of 20221743 is about 272.4412487318.

Adding to 20221743 its reverse (34712202), we get a palindrome (54933945).

It can be divided in two parts, 202 and 21743, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 20221743 in words is "twenty million, two hundred twenty-one thousand, seven hundred forty-three".