21000938458386 has 16 divisors (see below), whose sum is σ = 42895533873024. Its totient is φ = 6851369993424.

The previous prime is 21000938458369. The next prime is 21000938458387. The reversal of 21000938458386 is 68385483900012.

It is a super-2 number, since 2×21000938458386² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000938458387) 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, 37235706205 + ... + 37235706768.

It is an arithmetic number, because the mean of its divisors is an integer number (2680970867064).

Almost surely, 2^{21000938458386} is an apocalyptic number.

21000938458386 is an abundant number, since it is smaller than the sum of its proper divisors (21894595414638).

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

21000938458386 is a wasteful number, since it uses less digits than its factorization.

21000938458386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74471413025.

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 21000938458386 in words is "twenty-one trillion, nine hundred thirty-eight million, four hundred fifty-eight thousand, three hundred eighty-six".