21930500010 has 64 divisors (see below), whose sum is σ = 53739624960. Its totient is φ = 5725992000.

The previous prime is 21930499991. The next prime is 21930500027. The reversal of 21930500010 is 1000503912.

It is a super-2 number, since 2×21930500010² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21930500010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419589 + ... + 468951.

It is an arithmetic number, because the mean of its divisors is an integer number (839681640).

Almost surely, 2^21930500010 is an apocalyptic number.

It is a pronic number, being equal to 148089×148090.

It is a practical number, because each smaller number is the sum of distinct divisors of 21930500010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26869812480).

21930500010 is an abundant number, since it is smaller than the sum of its proper divisors (31809124950).

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

21930500010 is a wasteful number, since it uses less digits than its factorization.

21930500010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49683.

The product of its (nonzero) digits is 270, while the sum is 21.

The spelling of 21930500010 in words is "twenty-one billion, nine hundred thirty million, five hundred thousand, ten".