21112641930 has 32 divisors (see below), whose sum is σ = 50688405504. Its totient is φ = 5628030656.

The previous prime is 21112641923. The next prime is 21112641931. The reversal of 21112641930 is 3914621112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (21112641931) 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 15 ways as a sum of consecutive naturals, for example, 38922 + ... + 209141.

It is an arithmetic number, because the mean of its divisors is an integer number (1584012672).

Almost surely, 2^21112641930 is an apocalyptic number.

21112641930 is an abundant number, since it is smaller than the sum of its proper divisors (29575763574).

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

21112641930 is a wasteful number, since it uses less digits than its factorization.

21112641930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250910.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 21112641930 in words is "twenty-one billion, one hundred twelve million, six hundred forty-one thousand, nine hundred thirty".