21602982044 has 12 divisors (see below), whose sum is σ = 43205964144. Its totient is φ = 9258420864.

The previous prime is 21602982029. The next prime is 21602982061. The reversal of 21602982044 is 44028920612.

It is a happy number.

21602982044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21602981989 and 21602982007.

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, 385767509 + ... + 385767564.

It is an arithmetic number, because the mean of its divisors is an integer number (3600497012).

Almost surely, 2^21602982044 is an apocalyptic number.

It is an amenable number.

21602982044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21602982044 is a wasteful number, since it uses less digits than its factorization.

21602982044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771535084 (or 771535082 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 21602982044 in words is "twenty-one billion, six hundred two million, nine hundred eighty-two thousand, forty-four".