21672114818 has 32 divisors (see below), whose sum is σ = 35346432000. Its totient is φ = 9927988560.

The previous prime is 21672114797. The next prime is 21672114833. The reversal of 21672114818 is 81841127612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066873 + ... + 2077331.

It is an arithmetic number, because the mean of its divisors is an integer number (1104576000).

Almost surely, 2^21672114818 is an apocalyptic number.

21672114818 is a deficient number, since it is larger than the sum of its proper divisors (13674317182).

21672114818 is a wasteful number, since it uses less digits than its factorization.

21672114818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270.

The product of its digits is 43008, while the sum is 41.

The spelling of 21672114818 in words is "twenty-one billion, six hundred seventy-two million, one hundred fourteen thousand, eight hundred eighteen".