18421025611 has 8 divisors (see below), whose sum is σ = 19223435520. Its totient is φ = 17618740392.

The previous prime is 18421025593. The next prime is 18421025639. The reversal of 18421025611 is 11652012481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18421025611 - 2²⁹ = 17884154699 is a prime.

It is a super-2 number, since 2×18421025611² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18421025671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394636 + ... + 438838.

It is an arithmetic number, because the mean of its divisors is an integer number (2402929440).

Almost surely, 2^18421025611 is an apocalyptic number.

18421025611 is a deficient number, since it is larger than the sum of its proper divisors (802409909).

18421025611 is a wasteful number, since it uses less digits than its factorization.

18421025611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62345.

The product of its (nonzero) digits is 3840, while the sum is 31.

The spelling of 18421025611 in words is "eighteen billion, four hundred twenty-one million, twenty-five thousand, six hundred eleven".