18914636620153 has 4 divisors (see below), whose sum is σ = 18914753855988. Its totient is φ = 18914519384320.

The previous prime is 18914636620147. The next prime is 18914636620171. The reversal of 18914636620153 is 35102663641981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16297110633024 + 2617525987129 = 4036968^2 + 1617877^2 .

It is a cyclic number.

It is not a de Polignac number, because 18914636620153 - 2¹⁷ = 18914636489081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18914636620094 and 18914636620103.

It is not an unprimeable number, because it can be changed into a prime (18914636620853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58375576 + ... + 58698697.

It is an arithmetic number, because the mean of its divisors is an integer number (4728688463997).

Almost surely, 2^{18914636620153} is an apocalyptic number.

It is an amenable number.

18914636620153 is a deficient number, since it is larger than the sum of its proper divisors (117235835).

18914636620153 is a wasteful number, since it uses less digits than its factorization.

18914636620153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117235834.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 18914636620153 in words is "eighteen trillion, nine hundred fourteen billion, six hundred thirty-six million, six hundred twenty thousand, one hundred fifty-three".