18467202121 has 8 divisors (see below), whose sum is σ = 18638310600. Its totient is φ = 18296853120.

The previous prime is 18467202101. The next prime is 18467202137. The reversal of 18467202121 is 12120276481.

It can be written as a sum of positive squares in 4 ways, for example, as 4364452096 + 14102750025 = 66064^2 + 118755^2 .

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 18467202121 - 2¹⁵ = 18467169353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18467202101) 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, 140956 + ... + 238333.

It is an arithmetic number, because the mean of its divisors is an integer number (2329788825).

Almost surely, 2^18467202121 is an apocalyptic number.

It is an amenable number.

18467202121 is a deficient number, since it is larger than the sum of its proper divisors (171108479).

18467202121 is a wasteful number, since it uses less digits than its factorization.

18467202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379739.

The product of its (nonzero) digits is 10752, while the sum is 34.

The spelling of 18467202121 in words is "eighteen billion, four hundred sixty-seven million, two hundred two thousand, one hundred twenty-one".