15842375421 has 8 divisors (see below), whose sum is σ = 21145908480. Its totient is φ = 10550212992.

The previous prime is 15842375411. The next prime is 15842375443. The reversal of 15842375421 is 12457324851.

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

It is not a de Polignac number, because 15842375421 - 2⁶ = 15842375357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15842375401) 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, 2839405 + ... + 2844978.

It is an arithmetic number, because the mean of its divisors is an integer number (2643238560).

Almost surely, 2^15842375421 is an apocalyptic number.

It is an amenable number.

15842375421 is a deficient number, since it is larger than the sum of its proper divisors (5303533059).

15842375421 is an equidigital number, since it uses as much as digits as its factorization.

15842375421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685315.

The product of its digits is 268800, while the sum is 42.

The spelling of 15842375421 in words is "fifteen billion, eight hundred forty-two million, three hundred seventy-five thousand, four hundred twenty-one".