21199460512 has 12 divisors (see below), whose sum is σ = 41736437946. Its totient is φ = 10599730240.

The previous prime is 21199460509. The next prime is 21199460519. The reversal of 21199460512 is 21506499112.

It can be written as a sum of positive squares in only one way, i.e., 11152204816 + 10047255696 = 105604^2 + 100236^2 .

It is not an unprimeable number, because it can be changed into a prime (21199460519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331241539 + ... + 331241602.

Almost surely, 2^21199460512 is an apocalyptic number.

It is an amenable number.

21199460512 is a deficient number, since it is larger than the sum of its proper divisors (20536977434).

21199460512 is an equidigital number, since it uses as much as digits as its factorization.

21199460512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662483151 (or 662483143 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 21199460512 in words is "twenty-one billion, one hundred ninety-nine million, four hundred sixty thousand, five hundred twelve".