15042391918 has 4 divisors (see below), whose sum is σ = 22563587880. Its totient is φ = 7521195958.

The previous prime is 15042391909. The next prime is 15042391951. The reversal of 15042391918 is 81919324051.

15042391918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×15042391918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3760597978 + ... + 3760597981.

It is an arithmetic number, because the mean of its divisors is an integer number (5640896970).

Almost surely, 2^15042391918 is an apocalyptic number.

15042391918 is a deficient number, since it is larger than the sum of its proper divisors (7521195962).

15042391918 is an equidigital number, since it uses as much as digits as its factorization.

15042391918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521195961.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 15042391918 in words is "fifteen billion, forty-two million, three hundred ninety-one thousand, nine hundred eighteen".