16520451212 has 6 divisors (see below), whose sum is σ = 28910789628. Its totient is φ = 8260225604.

The previous prime is 16520451187. The next prime is 16520451217. The reversal of 16520451212 is 21215402561.

It is not an unprimeable number, because it can be changed into a prime (16520451217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065056398 + ... + 2065056405.

It is an arithmetic number, because the mean of its divisors is an integer number (4818464938).

Almost surely, 2^16520451212 is an apocalyptic number.

It is an amenable number.

16520451212 is a deficient number, since it is larger than the sum of its proper divisors (12390338416).

16520451212 is a wasteful number, since it uses less digits than its factorization.

16520451212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130112807 (or 4130112805 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 16520451212 its reverse (21215402561), we get a palindrome (37735853773).

The spelling of 16520451212 in words is "sixteen billion, five hundred twenty million, four hundred fifty-one thousand, two hundred twelve".