20010220999 has 4 divisors (see below), whose sum is σ = 20010580000. Its totient is φ = 20009862000.

The previous prime is 20010220987. The next prime is 20010221039. The reversal of 20010220999 is 99902201002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20010220999 - 2²⁹ = 19473350087 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 (20010220939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75999 + ... + 214000.

It is an arithmetic number, because the mean of its divisors is an integer number (5002645000).

Almost surely, 2^20010220999 is an apocalyptic number.

20010220999 is a deficient number, since it is larger than the sum of its proper divisors (359001).

20010220999 is an equidigital number, since it uses as much as digits as its factorization.

20010220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359000.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 20010220999 in words is "twenty billion, ten million, two hundred twenty thousand, nine hundred ninety-nine".