21163316160004 has 24 divisors (see below), whose sum is σ = 37817180662968. Its totient is φ = 10360523520000.

The previous prime is 21163316159989. The next prime is 21163316160037. The reversal of 21163316160004 is 40006161336112.

It can be written as a sum of positive squares in 4 ways, for example, as 8840393958400 + 12322922201604 = 2973280^2 + 3510402^2 .

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, 264474997 + ... + 264555004.

It is an arithmetic number, because the mean of its divisors is an integer number (1575715860957).

Almost surely, 2^{21163316160004} is an apocalyptic number.

It is an amenable number.

21163316160004 is a deficient number, since it is larger than the sum of its proper divisors (16653864502964).

21163316160004 is a wasteful number, since it uses less digits than its factorization.

21163316160004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529030215 (or 529030213 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 21163316160004 its reverse (40006161336112), we get a palindrome (61169477496116).

The spelling of 21163316160004 in words is "twenty-one trillion, one hundred sixty-three billion, three hundred sixteen million, one hundred sixty thousand, four".