18620265408 has 28 divisors (see below), whose sum is σ = 49266119400. Its totient is φ = 6206755072.

The previous prime is 18620265383. The next prime is 18620265409. The reversal of 18620265408 is 80456202681.

It is a super-2 number, since 2×18620265408² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18620265408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18620265409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48490083 + ... + 48490466.

Almost surely, 2^18620265408 is an apocalyptic number.

It is an amenable number.

18620265408 is an abundant number, since it is smaller than the sum of its proper divisors (30645853992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18620265408 is an equidigital number, since it uses as much as digits as its factorization.

18620265408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96980564 (or 96980554 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 18620265408 in words is "eighteen billion, six hundred twenty million, two hundred sixty-five thousand, four hundred eight".