21413109999 has 16 divisors (see below), whose sum is σ = 28755104000. Its totient is φ = 14173439616.

The previous prime is 21413109997. The next prime is 21413110003. The reversal of 21413109999 is 99990131412.

It is a happy number.

It is not a de Polignac number, because 21413109999 - 2¹ = 21413109997 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 (21413109997) 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, 471702 + ... + 515100.

It is an arithmetic number, because the mean of its divisors is an integer number (1797194000).

Almost surely, 2^21413109999 is an apocalyptic number.

21413109999 is a deficient number, since it is larger than the sum of its proper divisors (7341994001).

21413109999 is a wasteful number, since it uses less digits than its factorization.

21413109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44574.

The product of its (nonzero) digits is 157464, while the sum is 48.

The spelling of 21413109999 in words is "twenty-one billion, four hundred thirteen million, one hundred nine thousand, nine hundred ninety-nine".