15204473987 has 16 divisors (see below), whose sum is σ = 16106112000. Its totient is φ = 14313166560.

The previous prime is 15204473981. The next prime is 15204474023. The reversal of 15204473987 is 78937440251.

It is a cyclic number.

It is not a de Polignac number, because 15204473987 - 2⁸ = 15204473731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15204473981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3707264 + ... + 3711362.

It is an arithmetic number, because the mean of its divisors is an integer number (1006632000).

Almost surely, 2^15204473987 is an apocalyptic number.

15204473987 is a deficient number, since it is larger than the sum of its proper divisors (901638013).

15204473987 is a wasteful number, since it uses less digits than its factorization.

15204473987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 15204473987 in words is "fifteen billion, two hundred four million, four hundred seventy-three thousand, nine hundred eighty-seven".