21103946315 has 16 divisors (see below), whose sum is σ = 25729796448. Its totient is φ = 16614164736.

The previous prime is 21103946287. The next prime is 21103946321. The reversal of 21103946315 is 51364930112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103946315 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96437 + ... + 226953.

It is an arithmetic number, because the mean of its divisors is an integer number (1608112278).

Almost surely, 2^21103946315 is an apocalyptic number.

21103946315 is a deficient number, since it is larger than the sum of its proper divisors (4625850133).

21103946315 is a wasteful number, since it uses less digits than its factorization.

21103946315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131038.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 21103946315 in words is "twenty-one billion, one hundred three million, nine hundred forty-six thousand, three hundred fifteen".