20002219991 has 8 divisors (see below), whose sum is σ = 21542567424. Its totient is φ = 18462117600.

The previous prime is 20002219969. The next prime is 20002220057. The reversal of 20002219991 is 19991220002.

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 20002219991 - 2³⁴ = 2822350807 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 (20002219901) 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 7 ways as a sum of consecutive naturals, for example, 130541 + ... + 238841.

It is an arithmetic number, because the mean of its divisors is an integer number (2692820928).

Almost surely, 2^20002219991 is an apocalyptic number.

20002219991 is a deficient number, since it is larger than the sum of its proper divisors (1540347433).

20002219991 is a wasteful number, since it uses less digits than its factorization.

20002219991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122521.

The product of its (nonzero) digits is 5832, while the sum is 35.

Adding to 20002219991 its reverse (19991220002), we get a palindrome (39993439993).

The spelling of 20002219991 in words is "twenty billion, two million, two hundred nineteen thousand, nine hundred ninety-one".