18152809857 has 32 divisors (see below), whose sum is σ = 33099144960. Its totient is φ = 9575107200.

The previous prime is 18152809847. The next prime is 18152809877. The reversal of 18152809857 is 75890825181.

It is not a de Polignac number, because 18152809857 - 2¹¹ = 18152807809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18152809847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3691644 + ... + 3696557.

It is an arithmetic number, because the mean of its divisors is an integer number (1034348280).

Almost surely, 2^18152809857 is an apocalyptic number.

It is an amenable number.

18152809857 is a deficient number, since it is larger than the sum of its proper divisors (14946335103).

18152809857 is a wasteful number, since it uses less digits than its factorization.

18152809857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388230 (or 7388224 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 54.

The spelling of 18152809857 in words is "eighteen billion, one hundred fifty-two million, eight hundred nine thousand, eight hundred fifty-seven".