18620309607 has 16 divisors (see below), whose sum is σ = 25588864992. Its totient is φ = 12035036160.

The previous prime is 18620309581. The next prime is 18620309611. The reversal of 18620309607 is 70690302681.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18620309607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18620309657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267298 + ... + 329679.

It is an arithmetic number, because the mean of its divisors is an integer number (1599304062).

Almost surely, 2^18620309607 is an apocalyptic number.

18620309607 is a deficient number, since it is larger than the sum of its proper divisors (6968555385).

18620309607 is a wasteful number, since it uses less digits than its factorization.

18620309607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597298.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 18620309607 in words is "eighteen billion, six hundred twenty million, three hundred nine thousand, six hundred seven".