20969041 has 4 divisors (see below), whose sum is σ = 22202532. Its totient is φ = 19735552.

The previous prime is 20969029. The next prime is 20969087. The reversal of 20969041 is 14096902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14096902 = 2 ⋅7048451.

It can be written as a sum of positive squares in 2 ways, for example, as 17048641 + 3920400 = 4129^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 20969041 - 2⁵ = 20969009 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20968994 and 20969012.

It is not an unprimeable number, because it can be changed into a prime (20969341) 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, 616720 + ... + 616753.

It is an arithmetic number, because the mean of its divisors is an integer number (5550633).

Almost surely, 2^20969041 is an apocalyptic number.

It is an amenable number.

20969041 is a deficient number, since it is larger than the sum of its proper divisors (1233491).

20969041 is a wasteful number, since it uses less digits than its factorization.

20969041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233490.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20969041 is about 4579.1965452468. The cubic root of 20969041 is about 275.7567739218.

The spelling of 20969041 in words is "twenty million, nine hundred sixty-nine thousand, forty-one".