18211001146 has 16 divisors (see below), whose sum is σ = 29580307848. Its totient is φ = 8358638400.

The previous prime is 18211001113. The next prime is 18211001147. The reversal of 18211001146 is 64110011281.

It can be written as a sum of positive squares in 4 ways, for example, as 1553226921 + 16657774225 = 39411^2 + 129065^2 .

It is a super-3 number, since 3×18211001146³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 18211001146.

It is not an unprimeable number, because it can be changed into a prime (18211001147) 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, 1930165 + ... + 1939576.

Almost surely, 2^18211001146 is an apocalyptic number.

18211001146 is a deficient number, since it is larger than the sum of its proper divisors (11369306702).

18211001146 is a wasteful number, since it uses less digits than its factorization.

18211001146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869937.

The product of its (nonzero) digits is 384, while the sum is 25.

The spelling of 18211001146 in words is "eighteen billion, two hundred eleven million, one thousand, one hundred forty-six".