21662353041 has 16 divisors (see below), whose sum is σ = 33067127808. Its totient is φ = 12356802000.

The previous prime is 21662353033. The next prime is 21662353049. The reversal of 21662353041 is 14035326612.

It is an interprime number because it is at equal distance from previous prime (21662353033) and next prime (21662353049).

It is not a de Polignac number, because 21662353041 - 2³ = 21662353033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21662352993 and 21662353011.

It is not an unprimeable number, because it can be changed into a prime (21662353049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891285 + ... + 915266.

It is an arithmetic number, because the mean of its divisors is an integer number (2066695488).

Almost surely, 2^21662353041 is an apocalyptic number.

21662353041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21662353041 is a deficient number, since it is larger than the sum of its proper divisors (11404774767).

21662353041 is a wasteful number, since it uses less digits than its factorization.

21662353041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807132.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 21662353041 its reverse (14035326612), we get a palindrome (35697679653).

The spelling of 21662353041 in words is "twenty-one billion, six hundred sixty-two million, three hundred fifty-three thousand, forty-one".