21826372990 has 16 divisors (see below), whose sum is σ = 39296193552. Its totient is φ = 8728610944.

The previous prime is 21826372969. The next prime is 21826372993. The reversal of 21826372990 is 9927362812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21826372993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194539 + ... + 285478.

It is an arithmetic number, because the mean of its divisors is an integer number (2456012097).

Almost surely, 2^21826372990 is an apocalyptic number.

21826372990 is a deficient number, since it is larger than the sum of its proper divisors (17469820562).

21826372990 is a wasteful number, since it uses less digits than its factorization.

21826372990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484571.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 21826372990 in words is "twenty-one billion, eight hundred twenty-six million, three hundred seventy-two thousand, nine hundred ninety".