18124477955 has 8 divisors (see below), whose sum is σ = 21771194352. Its totient is φ = 14485035168.

The previous prime is 18124477951. The next prime is 18124477979. The reversal of 18124477955 is 55977442181.

It is a happy number.

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 18124477955 - 2² = 18124477951 is a prime.

It is a super-2 number, since 2×18124477955² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18124477897 and 18124477906.

It is not an unprimeable number, because it can be changed into a prime (18124477951) 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, 1812917 + ... + 1822886.

It is an arithmetic number, because the mean of its divisors is an integer number (2721399294).

Almost surely, 2^18124477955 is an apocalyptic number.

18124477955 is a deficient number, since it is larger than the sum of its proper divisors (3646716397).

18124477955 is an equidigital number, since it uses as much as digits as its factorization.

18124477955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636805.

The product of its digits is 2822400, while the sum is 53.

The spelling of 18124477955 in words is "eighteen billion, one hundred twenty-four million, four hundred seventy-seven thousand, nine hundred fifty-five".