21980183246 has 8 divisors (see below), whose sum is σ = 37680314160. Its totient is φ = 9420078528.

The previous prime is 21980183209. The next prime is 21980183287. The reversal of 21980183246 is 64238108912.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21980183197 and 21980183206.

It is a congruent number.

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, 785006531 + ... + 785006558.

It is an arithmetic number, because the mean of its divisors is an integer number (4710039270).

Almost surely, 2^21980183246 is an apocalyptic number.

21980183246 is a deficient number, since it is larger than the sum of its proper divisors (15700130914).

21980183246 is a wasteful number, since it uses less digits than its factorization.

21980183246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570013098.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 21980183246 in words is "twenty-one billion, nine hundred eighty million, one hundred eighty-three thousand, two hundred forty-six".