21834116388 has 72 divisors (see below), whose sum is σ = 64363644800. Its totient is φ = 6238315440.

The previous prime is 21834116387. The next prime is 21834116389. The reversal of 21834116388 is 88361143812.

21834116388 is a `hidden beast` number, since 2 + 1 + 8 + 3 + 4 + 1 + 1 + 638 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (21834116387) and next prime (21834116389).

It is not an unprimeable number, because it can be changed into a prime (21834116383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 871768 + ... + 896463.

Almost surely, 2^21834116388 is an apocalyptic number.

21834116388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21834116388 is an abundant number, since it is smaller than the sum of its proper divisors (42529528412).

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

21834116388 is a wasteful number, since it uses less digits than its factorization.

21834116388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768262 (or 1768243 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The spelling of 21834116388 in words is "twenty-one billion, eight hundred thirty-four million, one hundred sixteen thousand, three hundred eighty-eight".