21176364140 has 48 divisors (see below), whose sum is σ = 45167370528. Its totient is φ = 8338235904.

The previous prime is 21176364119. The next prime is 21176364149. The reversal of 21176364140 is 4146367112.

It is a super-3 number, since 3×21176364140³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21176364140.

It is not an unprimeable number, because it can be changed into a prime (21176364149) 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 15 ways as a sum of consecutive naturals, for example, 749714 + ... + 777446.

It is an arithmetic number, because the mean of its divisors is an integer number (940986886).

Almost surely, 2^21176364140 is an apocalyptic number.

21176364140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21176364140 is an abundant number, since it is smaller than the sum of its proper divisors (23991006388).

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

21176364140 is a wasteful number, since it uses less digits than its factorization.

21176364140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28338 (or 28336 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 21176364140 in words is "twenty-one billion, one hundred seventy-six million, three hundred sixty-four thousand, one hundred forty".