21699884603 has 2 divisors, whose sum is σ = 21699884604. Its totient is φ = 21699884602.

The previous prime is 21699884539. The next prime is 21699884669. The reversal of 21699884603 is 30648899612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21699884603 - 2⁶ = 21699884539 is a prime.

It is not a weakly prime, because it can be changed into another prime (21699884303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10849942301 + 10849942302.

It is an arithmetic number, because the mean of its divisors is an integer number (10849942302).

Almost surely, 2^21699884603 is an apocalyptic number.

21699884603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21699884603 is an equidigital number, since it uses as much as digits as its factorization.

21699884603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 21699884603 in words is "twenty-one billion, six hundred ninety-nine million, eight hundred eighty-four thousand, six hundred three".