18737210216 has 32 divisors (see below), whose sum is σ = 36496634880. Its totient is φ = 9008625600.

The previous prime is 18737210197. The next prime is 18737210251. The reversal of 18737210216 is 61201273781.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18737210216.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201680 + ... + 279551.

It is an arithmetic number, because the mean of its divisors is an integer number (1140519840).

Almost surely, 2^18737210216 is an apocalyptic number.

It is an amenable number.

18737210216 is a deficient number, since it is larger than the sum of its proper divisors (17759424664).

18737210216 is a wasteful number, since it uses less digits than its factorization.

18737210216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481425 (or 481421 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

Adding to 18737210216 its reverse (61201273781), we get a palindrome (79938483997).

The spelling of 18737210216 in words is "eighteen billion, seven hundred thirty-seven million, two hundred ten thousand, two hundred sixteen".