21796203841 has 2 divisors, whose sum is σ = 21796203842. Its totient is φ = 21796203840.

The previous prime is 21796203833. The next prime is 21796203887. The reversal of 21796203841 is 14830269712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13503369616 + 8292834225 = 116204^2 + 91065^2 .

It is a cyclic number.

It is not a de Polignac number, because 21796203841 - 2³ = 21796203833 is a prime.

It is not a weakly prime, because it can be changed into another prime (21796203811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10898101920 + 10898101921.

It is an arithmetic number, because the mean of its divisors is an integer number (10898101921).

Almost surely, 2^21796203841 is an apocalyptic number.

It is an amenable number.

21796203841 is a deficient number, since it is larger than the sum of its proper divisors (1).

21796203841 is an equidigital number, since it uses as much as digits as its factorization.

21796203841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 21796203841 in words is "twenty-one billion, seven hundred ninety-six million, two hundred three thousand, eight hundred forty-one".