18222601487 has 4 divisors (see below), whose sum is σ = 18410463456. Its totient is φ = 18034739520.

The previous prime is 18222601451. The next prime is 18222601493. The reversal of 18222601487 is 78410622281.

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

It is a cyclic number.

It is not a de Polignac number, because 18222601487 - 2⁸ = 18222601231 is a prime.

It is a super-2 number, since 2×18222601487² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222601687) 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, 93930839 + ... + 93931032.

It is an arithmetic number, because the mean of its divisors is an integer number (4602615864).

Almost surely, 2^18222601487 is an apocalyptic number.

18222601487 is a deficient number, since it is larger than the sum of its proper divisors (187861969).

18222601487 is an equidigital number, since it uses as much as digits as its factorization.

18222601487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187861968.

The product of its (nonzero) digits is 86016, while the sum is 41.

The spelling of 18222601487 in words is "eighteen billion, two hundred twenty-two million, six hundred one thousand, four hundred eighty-seven".