21113134344 has 48 divisors (see below), whose sum is σ = 57189544620. Its totient is φ = 7036709760.

The previous prime is 21113134337. The next prime is 21113134351. The reversal of 21113134344 is 44343131112.

21113134344 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 313 + 4 + 344 = 666.

It is an interprime number because it is at equal distance from previous prime (21113134337) and next prime (21113134351).

It can be written as a sum of positive squares in 2 ways, for example, as 17273844900 + 3839289444 = 131430^2 + 61962^2 .

It is a super-3 number, since 3×21113134344³ (a number of 32 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 627354 + ... + 660150.

Almost surely, 2^21113134344 is an apocalyptic number.

21113134344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21113134344 is an abundant number, since it is smaller than the sum of its proper divisors (36076410276).

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

21113134344 is a wasteful number, since it uses less digits than its factorization.

21113134344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41750 (or 41743 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21113134344 its reverse (44343131112), we get a palindrome (65456265456).

The spelling of 21113134344 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-four thousand, three hundred forty-four".