15432120019 has 4 divisors (see below), whose sum is σ = 15518333160. Its totient is φ = 15345906880.

The previous prime is 15432119999. The next prime is 15432120097. The reversal of 15432120019 is 91002123451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91002123451 = 761 ⋅119582291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15432120019 is a prime.

It is a super-2 number, since 2×15432120019² (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 (15432120419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43106302 + ... + 43106659.

It is an arithmetic number, because the mean of its divisors is an integer number (3879583290).

Almost surely, 2^15432120019 is an apocalyptic number.

15432120019 is a deficient number, since it is larger than the sum of its proper divisors (86213141).

15432120019 is an equidigital number, since it uses as much as digits as its factorization.

15432120019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86213140.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 15432120019 in words is "fifteen billion, four hundred thirty-two million, one hundred twenty thousand, nineteen".