21850333385 has 16 divisors (see below), whose sum is σ = 27392466816. Its totient is φ = 16700669568.

The previous prime is 21850333369. The next prime is 21850333397. The reversal of 21850333385 is 58333305812.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21850333385 - 2⁴ = 21850333369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12299 + ... + 209408.

It is an arithmetic number, because the mean of its divisors is an integer number (1712029176).

Almost surely, 2^21850333385 is an apocalyptic number.

It is an amenable number.

21850333385 is a deficient number, since it is larger than the sum of its proper divisors (5542133431).

21850333385 is a wasteful number, since it uses less digits than its factorization.

21850333385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222592.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21850333385 in words is "twenty-one billion, eight hundred fifty million, three hundred thirty-three thousand, three hundred eighty-five".