15384941921 has 8 divisors (see below), whose sum is σ = 15750773280. Its totient is φ = 15019476192.

The previous prime is 15384941909. The next prime is 15384941927. The reversal of 15384941921 is 12914948351.

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

It is not a de Polignac number, because 15384941921 - 2¹⁰ = 15384940897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15384941927) 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, 5300 + ... + 175493.

It is an arithmetic number, because the mean of its divisors is an integer number (1968846660).

Almost surely, 2^15384941921 is an apocalyptic number.

It is an amenable number.

15384941921 is a deficient number, since it is larger than the sum of its proper divisors (365831359).

15384941921 is a wasteful number, since it uses less digits than its factorization.

15384941921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182815.

The product of its digits is 311040, while the sum is 47.

The spelling of 15384941921 in words is "fifteen billion, three hundred eighty-four million, nine hundred forty-one thousand, nine hundred twenty-one".