18265809007 has 16 divisors (see below), whose sum is σ = 19746247680. Its totient is φ = 16844335200.

The previous prime is 18265808989. The next prime is 18265809043. The reversal of 18265809007 is 70090856281.

It is a de Polignac number, because none of the positive numbers 2^k-18265809007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18265809047) 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, 441082 + ... + 480712.

It is an arithmetic number, because the mean of its divisors is an integer number (1234140480).

Almost surely, 2^18265809007 is an apocalyptic number.

18265809007 is a deficient number, since it is larger than the sum of its proper divisors (1480438673).

18265809007 is a wasteful number, since it uses less digits than its factorization.

18265809007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40374.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 18265809007 in words is "eighteen billion, two hundred sixty-five million, eight hundred nine thousand, seven".