21785296030 has 16 divisors (see below), whose sum is σ = 39222855504. Its totient is φ = 8712046720.

The previous prime is 21785295991. The next prime is 21785296037. The reversal of 21785296030 is 3069258712.

It is a super-2 number, since 2×21785296030² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21785296037) 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, 214432 + ... + 299251.

It is an arithmetic number, because the mean of its divisors is an integer number (2451428469).

Almost surely, 2^21785296030 is an apocalyptic number.

21785296030 is a deficient number, since it is larger than the sum of its proper divisors (17437559474).

21785296030 is a wasteful number, since it uses less digits than its factorization.

21785296030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517931.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 21785296030 in words is "twenty-one billion, seven hundred eighty-five million, two hundred ninety-six thousand, thirty".