19621117969 has 8 divisors (see below), whose sum is σ = 20289709440. Its totient is φ = 18963577776.

The previous prime is 19621117963. The next prime is 19621117981. The reversal of 19621117969 is 96971112691.

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 19621117969 - 2¹³ = 19621109777 is a prime.

It is a super-2 number, since 2×19621117969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19621117963) 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, 2759209 + ... + 2766310.

It is an arithmetic number, because the mean of its divisors is an integer number (2536213680).

Almost surely, 2^19621117969 is an apocalyptic number.

It is an amenable number.

19621117969 is a deficient number, since it is larger than the sum of its proper divisors (668591471).

19621117969 is an equidigital number, since it uses as much as digits as its factorization.

19621117969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525639.

The product of its digits is 367416, while the sum is 52.

The spelling of 19621117969 in words is "nineteen billion, six hundred twenty-one million, one hundred seventeen thousand, nine hundred sixty-nine".