21868368350 has 12 divisors (see below), whose sum is σ = 40675165224. Its totient is φ = 8747347320.

The previous prime is 21868368341. The next prime is 21868368373. The reversal of 21868368350 is 5386386812.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 437367367 = 21868368350 / (2 + 1 + 8 + 6 + 8 + 3 + 6 + 8 + 3 + 5 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218683634 + ... + 218683733.

It is an arithmetic number, because the mean of its divisors is an integer number (3389597102).

Almost surely, 2^21868368350 is an apocalyptic number.

21868368350 is a deficient number, since it is larger than the sum of its proper divisors (18806796874).

21868368350 is a wasteful number, since it uses less digits than its factorization.

21868368350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437367379 (or 437367374 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 21868368350 in words is "twenty-one billion, eight hundred sixty-eight million, three hundred sixty-eight thousand, three hundred fifty".