21759200099 has 32 divisors (see below), whose sum is σ = 28376643456. Its totient is φ = 16191498240.

The previous prime is 21759200069. The next prime is 21759200107. The reversal of 21759200099 is 99000295712.

It is a happy number.

It is a Cunningham number, because it is equal to 147510²-1.

It is a cyclic number.

It is not a de Polignac number, because 21759200099 - 2⁸ = 21759199843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21759200069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2503349 + ... + 2512025.

It is an arithmetic number, because the mean of its divisors is an integer number (886770108).

Almost surely, 2^21759200099 is an apocalyptic number.

21759200099 is a deficient number, since it is larger than the sum of its proper divisors (6617443357).

21759200099 is a wasteful number, since it uses less digits than its factorization.

21759200099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10335.

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 21759200099 in words is "twenty-one billion, seven hundred fifty-nine million, two hundred thousand, ninety-nine".