21146050117 has 16 divisors (see below), whose sum is σ = 22645609344. Its totient is φ = 19676160000.

The previous prime is 21146050097. The next prime is 21146050129. The reversal of 21146050117 is 71105064112.

It is a cyclic number.

It is not a de Polignac number, because 21146050117 - 2⁷ = 21146049989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146050157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522117 + ... + 561157.

It is an arithmetic number, because the mean of its divisors is an integer number (1415350584).

Almost surely, 2^21146050117 is an apocalyptic number.

It is an amenable number.

21146050117 is a deficient number, since it is larger than the sum of its proper divisors (1499559227).

21146050117 is a wasteful number, since it uses less digits than its factorization.

21146050117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39420.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 21146050117 in words is "twenty-one billion, one hundred forty-six million, fifty thousand, one hundred seventeen".