20002199981 has 8 divisors (see below), whose sum is σ = 20432611584. Its totient is φ = 19571989840.

The previous prime is 20002199951. The next prime is 20002199989. The reversal of 20002199981 is 18999120002.

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 20002199981 - 2²⁶ = 19935091117 is a prime.

It is a super-2 number, since 2×20002199981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002199989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159656 + ... + 255918.

It is an arithmetic number, because the mean of its divisors is an integer number (2554076448).

Almost surely, 2^20002199981 is an apocalyptic number.

It is an amenable number.

20002199981 is a deficient number, since it is larger than the sum of its proper divisors (430411603).

20002199981 is an equidigital number, since it uses as much as digits as its factorization.

20002199981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100731.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 20002199981 in words is "twenty billion, two million, one hundred ninety-nine thousand, nine hundred eighty-one".