21350407885 has 16 divisors (see below), whose sum is σ = 26581243392. Its totient is φ = 16445419200.

The previous prime is 21350407873. The next prime is 21350407889. The reversal of 21350407885 is 58870405312.

It is not a de Polignac number, because 21350407885 - 2⁵ = 21350407853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350407889) 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, 319071 + ... + 380140.

It is an arithmetic number, because the mean of its divisors is an integer number (1661327712).

Almost surely, 2^21350407885 is an apocalyptic number.

It is an amenable number.

21350407885 is a deficient number, since it is larger than the sum of its proper divisors (5230835507).

21350407885 is a wasteful number, since it uses less digits than its factorization.

21350407885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699444.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 21350407885 in words is "twenty-one billion, three hundred fifty million, four hundred seven thousand, eight hundred eighty-five".