21850573347 has 12 divisors (see below), whose sum is σ = 31563478440. Its totient is φ = 14566338528.

The previous prime is 21850573337. The next prime is 21850573351. The reversal of 21850573347 is 74337505812.

21850573347 is a `hidden beast` number, since 21 + 8 + 50 + 573 + 3 + 4 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21850573347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21850573337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191479 + ... + 283487.

It is an arithmetic number, because the mean of its divisors is an integer number (2630289870).

Almost surely, 2^21850573347 is an apocalyptic number.

21850573347 is a deficient number, since it is larger than the sum of its proper divisors (9712905093).

21850573347 is a wasteful number, since it uses less digits than its factorization.

21850573347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118402 (or 118399 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 21850573347 in words is "twenty-one billion, eight hundred fifty million, five hundred seventy-three thousand, three hundred forty-seven".