21999059067 has 24 divisors (see below), whose sum is σ = 30685748800. Its totient is φ = 14017904208.

The previous prime is 21999059063. The next prime is 21999059101. The reversal of 21999059067 is 76095099912.

It is not a de Polignac number, because 21999059067 - 2² = 21999059063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21999058998 and 21999059016.

It is not an unprimeable number, because it can be changed into a prime (21999059063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2501484 + ... + 2510262.

Almost surely, 2^21999059067 is an apocalyptic number.

21999059067 is a deficient number, since it is larger than the sum of its proper divisors (8686689733).

21999059067 is a wasteful number, since it uses less digits than its factorization.

21999059067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407 (or 10384 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 57.

The spelling of 21999059067 in words is "twenty-one billion, nine hundred ninety-nine million, fifty-nine thousand, sixty-seven".