21899709218 has 8 divisors (see below), whose sum is σ = 32853650112. Its totient is φ = 10948492516.

The previous prime is 21899709203. The next prime is 21899709229. The reversal of 21899709218 is 81290799812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660830 + ... + 693177.

It is an arithmetic number, because the mean of its divisors is an integer number (4106706264).

Almost surely, 2^21899709218 is an apocalyptic number.

21899709218 is a deficient number, since it is larger than the sum of its proper divisors (10953940894).

21899709218 is a wasteful number, since it uses less digits than its factorization.

21899709218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362096.

The product of its (nonzero) digits is 1306368, while the sum is 56.

The spelling of 21899709218 in words is "twenty-one billion, eight hundred ninety-nine million, seven hundred nine thousand, two hundred eighteen".