16812603972 has 30 divisors (see below), whose sum is σ = 43951468638. Its totient is φ = 5604201216.

The previous prime is 16812603961. The next prime is 16812604027. The reversal of 16812603972 is 27930621861.

It can be written as a sum of positive squares in only one way, i.e., 12202737156 + 4609866816 = 110466^2 + 67896^2 .

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 25945053 + ... + 25945700.

Almost surely, 2^16812603972 is an apocalyptic number.

16812603972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16812603972 is an abundant number, since it is smaller than the sum of its proper divisors (27138864666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16812603972 is a wasteful number, since it uses less digits than its factorization.

16812603972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51890769 (or 51890758 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 16812603972 in words is "sixteen billion, eight hundred twelve million, six hundred three thousand, nine hundred seventy-two".