21783426010 has 32 divisors (see below), whose sum is σ = 39526477200. Its totient is φ = 8643237888.

The previous prime is 21783425981. The next prime is 21783426023. The reversal of 21783426010 is 1062438712.

It can be written as a sum of positive squares in 8 ways, for example, as 5692249809 + 16091176201 = 75447^2 + 126851^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1142314 + ... + 1161226.

Almost surely, 2^21783426010 is an apocalyptic number.

21783426010 is a deficient number, since it is larger than the sum of its proper divisors (17743051190).

21783426010 is a wasteful number, since it uses less digits than its factorization.

21783426010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19842.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 21783426010 in words is "twenty-one billion, seven hundred eighty-three million, four hundred twenty-six thousand, ten".