21830249331 has 48 divisors (see below), whose sum is σ = 36503026560. Its totient is φ = 12922701120.

The previous prime is 21830249327. The next prime is 21830249333. The reversal of 21830249331 is 13394203812.

21830249331 is a `hidden beast` number, since 2 + 1 + 83 + 0 + 249 + 331 = 666.

It is not a de Polignac number, because 21830249331 - 2² = 21830249327 is a prime.

It is a super-2 number, since 2×21830249331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21830249333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19975 + ... + 209903.

It is an arithmetic number, because the mean of its divisors is an integer number (760479720).

Almost surely, 2^21830249331 is an apocalyptic number.

21830249331 is a deficient number, since it is larger than the sum of its proper divisors (14672777229).

21830249331 is a wasteful number, since it uses less digits than its factorization.

21830249331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189998 (or 189986 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 21830249331 in words is "twenty-one billion, eight hundred thirty million, two hundred forty-nine thousand, three hundred thirty-one".