18807477001 has 2 divisors, whose sum is σ = 18807477002. Its totient is φ = 18807477000.

The previous prime is 18807476999. The next prime is 18807477019. The reversal of 18807477001 is 10077470881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17305139401 + 1502337600 = 131549^2 + 38760^2 .

It is a cyclic number.

It is not a de Polignac number, because 18807477001 - 2¹ = 18807476999 is a prime.

It is a super-2 number, since 2×18807477001² (a number of 21 digits) contains 22 as substring.

Together with 18807476999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18807477061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9403738500 + 9403738501.

It is an arithmetic number, because the mean of its divisors is an integer number (9403738501).

Almost surely, 2^18807477001 is an apocalyptic number.

It is an amenable number.

18807477001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18807477001 is an equidigital number, since it uses as much as digits as its factorization.

18807477001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87808, while the sum is 43.

The spelling of 18807477001 in words is "eighteen billion, eight hundred seven million, four hundred seventy-seven thousand, one".