21177620313 has 8 divisors (see below), whose sum is σ = 28410059808. Its totient is φ = 14031797184.

The previous prime is 21177620281. The next prime is 21177620339. The reversal of 21177620313 is 31302677112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21177620313 - 2⁵ = 21177620281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21177620383) 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, 21653520 + ... + 21654497.

It is an arithmetic number, because the mean of its divisors is an integer number (3551257476).

Almost surely, 2^21177620313 is an apocalyptic number.

It is an amenable number.

21177620313 is a deficient number, since it is larger than the sum of its proper divisors (7232439495).

21177620313 is a wasteful number, since it uses less digits than its factorization.

21177620313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43308183.

The product of its (nonzero) digits is 10584, while the sum is 33.

The spelling of 21177620313 in words is "twenty-one billion, one hundred seventy-seven million, six hundred twenty thousand, three hundred thirteen".