18842847621 has 16 divisors (see below), whose sum is σ = 27360406080. Its totient is φ = 11465308800.

The previous prime is 18842847607. The next prime is 18842847659. The reversal of 18842847621 is 12674824881.

It is a happy number.

It is not a de Polignac number, because 18842847621 - 2¹⁴ = 18842831237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18842846621) 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, 2710855 + ... + 2717796.

It is an arithmetic number, because the mean of its divisors is an integer number (1710025380).

Almost surely, 2^18842847621 is an apocalyptic number.

It is an amenable number.

18842847621 is a deficient number, since it is larger than the sum of its proper divisors (8517558459).

18842847621 is a wasteful number, since it uses less digits than its factorization.

18842847621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5428756.

The product of its digits is 1376256, while the sum is 51.

The spelling of 18842847621 in words is "eighteen billion, eight hundred forty-two million, eight hundred forty-seven thousand, six hundred twenty-one".