21103106936 has 8 divisors (see below), whose sum is σ = 39568325520. Its totient is φ = 10551553464.

The previous prime is 21103106923. The next prime is 21103106957. The reversal of 21103106936 is 63960130112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21103106936² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318944176 + ... + 1318944191.

It is an arithmetic number, because the mean of its divisors is an integer number (4946040690).

Almost surely, 2^21103106936 is an apocalyptic number.

It is an amenable number.

21103106936 is a deficient number, since it is larger than the sum of its proper divisors (18465218584).

21103106936 is a wasteful number, since it uses less digits than its factorization.

21103106936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637888373 (or 2637888369 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 21103106936 in words is "twenty-one billion, one hundred three million, one hundred six thousand, nine hundred thirty-six".