21091614913 has 8 divisors (see below), whose sum is σ = 21313077632. Its totient is φ = 20870234496.

The previous prime is 21091614889. The next prime is 21091614923. The reversal of 21091614913 is 31941619012.

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

It is a cyclic number.

It is not a de Polignac number, because 21091614913 - 2¹³ = 21091606721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21091614923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588556 + ... + 623362.

It is an arithmetic number, because the mean of its divisors is an integer number (2664134704).

Almost surely, 2^21091614913 is an apocalyptic number.

It is an amenable number.

21091614913 is a deficient number, since it is larger than the sum of its proper divisors (221462719).

21091614913 is an equidigital number, since it uses as much as digits as its factorization.

21091614913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41151.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 21091614913 in words is "twenty-one billion, ninety-one million, six hundred fourteen thousand, nine hundred thirteen".