18047142550 has 12 divisors (see below), whose sum is σ = 33567685236. Its totient is φ = 7218857000.

The previous prime is 18047142541. The next prime is 18047142551. The reversal of 18047142550 is 5524174081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18047142551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180471376 + ... + 180471475.

It is an arithmetic number, because the mean of its divisors is an integer number (2797307103).

Almost surely, 2^18047142550 is an apocalyptic number.

18047142550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18047142550 is a deficient number, since it is larger than the sum of its proper divisors (15520542686).

18047142550 is a wasteful number, since it uses less digits than its factorization.

18047142550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360942863 (or 360942858 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 18047142550 in words is "eighteen billion, forty-seven million, one hundred forty-two thousand, five hundred fifty".