21113000420 has 24 divisors (see below), whose sum is σ = 46265010624. Its totient is φ = 8078017376.

The previous prime is 21113000411. The next prime is 21113000423. The reversal of 21113000420 is 2400031112.

It is a junction number, because it is equal to n+sod(n) for n = 21113000395 and 21113000404.

It is not an unprimeable number, because it can be changed into a prime (21113000423) 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, 22948454 + ... + 22949373.

It is an arithmetic number, because the mean of its divisors is an integer number (1927708776).

Almost surely, 2^21113000420 is an apocalyptic number.

21113000420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113000420 is an abundant number, since it is smaller than the sum of its proper divisors (25152010204).

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

21113000420 is a wasteful number, since it uses less digits than its factorization.

21113000420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45897859 (or 45897857 counting only the distinct ones).

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

Adding to 21113000420 its reverse (2400031112), we get a palindrome (23513031532).

The spelling of 21113000420 in words is "twenty-one billion, one hundred thirteen million, four hundred twenty", and thus it is an aban number.