21831860149 has 8 divisors (see below), whose sum is σ = 25070078880. Its totient is φ = 18802558800.

The previous prime is 21831860059. The next prime is 21831860177. The reversal of 21831860149 is 94106813812.

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

It is a cyclic number.

It is not a de Polignac number, because 21831860149 - 2¹³ = 21831851957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21831860189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52229122 + ... + 52229539.

It is an arithmetic number, because the mean of its divisors is an integer number (3133759860).

Almost surely, 2^21831860149 is an apocalyptic number.

It is an amenable number.

21831860149 is a deficient number, since it is larger than the sum of its proper divisors (3238218731).

21831860149 is a wasteful number, since it uses less digits than its factorization.

21831860149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104458691.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 21831860149 in words is "twenty-one billion, eight hundred thirty-one million, eight hundred sixty thousand, one hundred forty-nine".