21670053350 has 36 divisors (see below), whose sum is σ = 44303630532. Its totient is φ = 7880017200.

The previous prime is 21670053331. The next prime is 21670053371. The reversal of 21670053350 is 5335007612.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1784864 + ... + 1796963.

Almost surely, 2^21670053350 is an apocalyptic number.

21670053350 is an abundant number, since it is smaller than the sum of its proper divisors (22633577182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21670053350 is a wasteful number, since it uses less digits than its factorization.

21670053350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581861 (or 3581845 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 32.

The spelling of 21670053350 in words is "twenty-one billion, six hundred seventy million, fifty-three thousand, three hundred fifty".