21113010423 has 8 divisors (see below), whose sum is σ = 31278534000. Its totient is φ = 14075340264.

The previous prime is 21113010421. The next prime is 21113010461. The reversal of 21113010423 is 32401031112.

21113010423 is a `hidden beast` number, since 211 + 1 + 30 + 1 + 0 + 423 = 666.

It is not a de Polignac number, because 21113010423 - 2¹ = 21113010421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113010396 and 21113010405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113010421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390981648 + ... + 390981701.

It is an arithmetic number, because the mean of its divisors is an integer number (3909816750).

Almost surely, 2^21113010423 is an apocalyptic number.

21113010423 is a deficient number, since it is larger than the sum of its proper divisors (10165523577).

21113010423 is an equidigital number, since it uses as much as digits as its factorization.

21113010423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781963358 (or 781963352 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21113010423 its reverse (32401031112), we get a palindrome (53514041535).

The spelling of 21113010423 in words is "twenty-one billion, one hundred thirteen million, ten thousand, four hundred twenty-three".