20011219988 has 24 divisors (see below), whose sum is σ = 35451108000. Its totient is φ = 9882397280.

The previous prime is 20011219981. The next prime is 20011219993. The reversal of 20011219988 is 88991211002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011219981) 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, 1900763 + ... + 1911261.

It is an arithmetic number, because the mean of its divisors is an integer number (1477129500).

Almost surely, 2^20011219988 is an apocalyptic number.

It is an amenable number.

20011219988 is a deficient number, since it is larger than the sum of its proper divisors (15439888012).

20011219988 is a wasteful number, since it uses less digits than its factorization.

20011219988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16327 (or 16325 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 41.

The spelling of 20011219988 in words is "twenty billion, eleven million, two hundred nineteen thousand, nine hundred eighty-eight".