20901811099 has 8 divisors (see below), whose sum is σ = 23694361040. Its totient is φ = 18278506656.

The previous prime is 20901811097. The next prime is 20901811109. The reversal of 20901811099 is 99011810902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20901811099 - 2¹ = 20901811097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20901811093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42311112 + ... + 42311605.

It is an arithmetic number, because the mean of its divisors is an integer number (2961795130).

Almost surely, 2^20901811099 is an apocalyptic number.

20901811099 is a deficient number, since it is larger than the sum of its proper divisors (2792549941).

20901811099 is a wasteful number, since it uses less digits than its factorization.

20901811099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84622749.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 20901811099 in words is "twenty billion, nine hundred one million, eight hundred eleven thousand, ninety-nine".