21400565350 has 12 divisors (see below), whose sum is σ = 39805051644. Its totient is φ = 8560226120.

The previous prime is 21400565339. The next prime is 21400565377. The reversal of 21400565350 is 5356500412.

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, 214005604 + ... + 214005703.

It is an arithmetic number, because the mean of its divisors is an integer number (3317087637).

Almost surely, 2^21400565350 is an apocalyptic number.

21400565350 is a deficient number, since it is larger than the sum of its proper divisors (18404486294).

21400565350 is a wasteful number, since it uses less digits than its factorization.

21400565350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428011319 (or 428011314 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 21400565350 in words is "twenty-one billion, four hundred million, five hundred sixty-five thousand, three hundred fifty".