18311010621 has 8 divisors (see below), whose sum is σ = 24576368064. Its totient is φ = 12126496800.

The previous prime is 18311010593. The next prime is 18311010643. The reversal of 18311010621 is 12601011381.

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

It is not a de Polignac number, because 18311010621 - 2¹⁷ = 18310879549 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18311010591 and 18311010600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18311010521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20210376 + ... + 20211281.

It is an arithmetic number, because the mean of its divisors is an integer number (3072046008).

Almost surely, 2^18311010621 is an apocalyptic number.

It is an amenable number.

18311010621 is a deficient number, since it is larger than the sum of its proper divisors (6265357443).

18311010621 is a wasteful number, since it uses less digits than its factorization.

18311010621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40421811.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 18311010621 in words is "eighteen billion, three hundred eleven million, ten thousand, six hundred twenty-one".