18787470061 has 8 divisors (see below), whose sum is σ = 18957860280. Its totient is φ = 18617152512.

The previous prime is 18787470059. The next prime is 18787470101. The reversal of 18787470061 is 16007478781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5489920836 + 13297549225 = 74094^2 + 115315^2 .

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 18787470061 - 2¹ = 18787470059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18787469987 and 18787470014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18787470011) 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 7 ways as a sum of consecutive naturals, for example, 593995 + ... + 624823.

It is an arithmetic number, because the mean of its divisors is an integer number (2369732535).

Almost surely, 2^18787470061 is an apocalyptic number.

It is an amenable number.

18787470061 is a deficient number, since it is larger than the sum of its proper divisors (170390219).

18787470061 is a wasteful number, since it uses less digits than its factorization.

18787470061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36335.

The product of its (nonzero) digits is 526848, while the sum is 49.

The spelling of 18787470061 in words is "eighteen billion, seven hundred eighty-seven million, four hundred seventy thousand, sixty-one".