21578417714 has 16 divisors (see below), whose sum is σ = 37004154048. Its totient is φ = 9244748112.

The previous prime is 21578417683. The next prime is 21578417717. The reversal of 21578417714 is 41771487512.

It is a super-2 number, since 2×21578417714² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21578417717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219224 + ... + 302019.

It is an arithmetic number, because the mean of its divisors is an integer number (2312759628).

Almost surely, 2^21578417714 is an apocalyptic number.

21578417714 is a deficient number, since it is larger than the sum of its proper divisors (15425736334).

21578417714 is a wasteful number, since it uses less digits than its factorization.

21578417714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524209.

The product of its digits is 439040, while the sum is 47.

The spelling of 21578417714 in words is "twenty-one billion, five hundred seventy-eight million, four hundred seventeen thousand, seven hundred fourteen".