19621117907 has 8 divisors (see below), whose sum is σ = 19764763392. Its totient is φ = 19477987200.

The previous prime is 19621117889. The next prime is 19621117951. The reversal of 19621117907 is 70971112691.

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 19621117907 - 2¹⁰ = 19621116883 is a prime.

It is a super-3 number, since 3×19621117907³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19621117207) 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, 52019 + ... + 204812.

It is an arithmetic number, because the mean of its divisors is an integer number (2470595424).

Almost surely, 2^19621117907 is an apocalyptic number.

19621117907 is a deficient number, since it is larger than the sum of its proper divisors (143645485).

19621117907 is a wasteful number, since it uses less digits than its factorization.

19621117907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257389.

The product of its (nonzero) digits is 47628, while the sum is 44.

The spelling of 19621117907 in words is "nineteen billion, six hundred twenty-one million, one hundred seventeen thousand, nine hundred seven".