18727261472 has 48 divisors (see below), whose sum is σ = 39065628672. Its totient is φ = 8806609920.

The previous prime is 18727261463. The next prime is 18727261481. The reversal of 18727261472 is 27416272781.

It is an interprime number because it is at equal distance from previous prime (18727261463) and next prime (18727261481).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810593 + ... + 833375.

It is an arithmetic number, because the mean of its divisors is an integer number (813867264).

Almost surely, 2^18727261472 is an apocalyptic number.

It is an amenable number.

18727261472 is an abundant number, since it is smaller than the sum of its proper divisors (20338367200).

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

18727261472 is a wasteful number, since it uses less digits than its factorization.

18727261472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24321 (or 24313 counting only the distinct ones).

The product of its digits is 526848, while the sum is 47.

The spelling of 18727261472 in words is "eighteen billion, seven hundred twenty-seven million, two hundred sixty-one thousand, four hundred seventy-two".