21000068358 has 16 divisors (see below), whose sum is σ = 42712004160. Its totient is φ = 6881378216.

The previous prime is 21000068357. The next prime is 21000068371. The reversal of 21000068358 is 85386000012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000068357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29660760 + ... + 29661467.

It is an arithmetic number, because the mean of its divisors is an integer number (2669500260).

Almost surely, 2^21000068358 is an apocalyptic number.

21000068358 is an abundant number, since it is smaller than the sum of its proper divisors (21711935802).

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

21000068358 is a wasteful number, since it uses less digits than its factorization.

21000068358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59322291.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 21000068358 in words is "twenty-one billion, sixty-eight thousand, three hundred fifty-eight".