21113020004 has 24 divisors (see below), whose sum is σ = 37941378048. Its totient is φ = 10275763680.

The previous prime is 21113020003. The next prime is 21113020021. The reversal of 21113020004 is 40002031112.

It is a super-2 number, since 2×21113020004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21113020003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 365162 + ... + 419009.

It is an arithmetic number, because the mean of its divisors is an integer number (1580890752).

Almost surely, 2^21113020004 is an apocalyptic number.

It is an amenable number.

21113020004 is a deficient number, since it is larger than the sum of its proper divisors (16828358044).

21113020004 is a wasteful number, since it uses less digits than its factorization.

21113020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784355 (or 784353 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21113020004 its reverse (40002031112), we get a palindrome (61115051116).

The spelling of 21113020004 in words is "twenty-one billion, one hundred thirteen million, twenty thousand, four".