18596629945 has 4 divisors (see below), whose sum is σ = 22315955940. Its totient is φ = 14877303952.

The previous prime is 18596629937. The next prime is 18596629969. The reversal of 18596629945 is 54992669581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54992669581 = 107 ⋅513950183.

It can be written as a sum of positive squares in 2 ways, for example, as 4596297616 + 14000332329 = 67796^2 + 118323^2 .

It is a cyclic number.

It is not a de Polignac number, because 18596629945 - 2³ = 18596629937 is a prime.

It is a super-2 number, since 2×18596629945² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859662990 + ... + 1859662999.

It is an arithmetic number, because the mean of its divisors is an integer number (5578988985).

Almost surely, 2^18596629945 is an apocalyptic number.

It is an amenable number.

18596629945 is a deficient number, since it is larger than the sum of its proper divisors (3719325995).

18596629945 is an equidigital number, since it uses as much as digits as its factorization.

18596629945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719325994.

The product of its digits is 41990400, while the sum is 64.

The spelling of 18596629945 in words is "eighteen billion, five hundred ninety-six million, six hundred twenty-nine thousand, nine hundred forty-five".