20933842441 has 4 divisors (see below), whose sum is σ = 21379243392. Its totient is φ = 20488441492.

The previous prime is 20933842399. The next prime is 20933842453. The reversal of 20933842441 is 14424833902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14424833902 = 2 ⋅7212416951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20933842441 is a prime.

It is a super-2 number, since 2×20933842441² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 = 20933842394 and 20933842403.

It is not an unprimeable number, because it can be changed into a prime (20933842481) 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, 222700405 + ... + 222700498.

It is an arithmetic number, because the mean of its divisors is an integer number (5344810848).

Almost surely, 2^20933842441 is an apocalyptic number.

It is an amenable number.

20933842441 is a deficient number, since it is larger than the sum of its proper divisors (445400951).

20933842441 is an equidigital number, since it uses as much as digits as its factorization.

20933842441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445400950.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 20933842441 in words is "twenty billion, nine hundred thirty-three million, eight hundred forty-two thousand, four hundred forty-one".