18478925357 has 8 divisors (see below), whose sum is σ = 19014001560. Its totient is φ = 17950753600.

The previous prime is 18478925341. The next prime is 18478925363. The reversal of 18478925357 is 75352987481.

It can be written as a sum of positive squares in 4 ways, for example, as 10288856356 + 8190069001 = 101434^2 + 90499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18478925357 - 2⁴ = 18478925341 is a prime.

It is a super-4 number, since 4×18478925357⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18478925296 and 18478925305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18478924357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720682 + ... + 1731387.

It is an arithmetic number, because the mean of its divisors is an integer number (2376750195).

Almost surely, 2^18478925357 is an apocalyptic number.

It is an amenable number.

18478925357 is a deficient number, since it is larger than the sum of its proper divisors (535076203).

18478925357 is a wasteful number, since it uses less digits than its factorization.

18478925357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452223.

The product of its digits is 16934400, while the sum is 59.

The spelling of 18478925357 in words is "eighteen billion, four hundred seventy-eight million, nine hundred twenty-five thousand, three hundred fifty-seven".