21100162013 has 8 divisors (see below), whose sum is σ = 24766213632. Its totient is φ = 17597046096.

The previous prime is 21100162007. The next prime is 21100162037. The reversal of 21100162013 is 31026100112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21100162013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21100161982 and 21100162000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100162063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40733645 + ... + 40734162.

It is an arithmetic number, because the mean of its divisors is an integer number (3095776704).

Almost surely, 2^21100162013 is an apocalyptic number.

It is an amenable number.

21100162013 is a deficient number, since it is larger than the sum of its proper divisors (3666051619).

21100162013 is an equidigital number, since it uses as much as digits as its factorization.

21100162013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81467851.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21100162013 its reverse (31026100112), we get a palindrome (52126262125).

The spelling of 21100162013 in words is "twenty-one billion, one hundred million, one hundred sixty-two thousand, thirteen".