20011219848 has 24 divisors (see below), whose sum is σ = 54197053950. Its totient is φ = 6670406592.

The previous prime is 20011219847. The next prime is 20011219849. The reversal of 20011219848 is 84891211002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20011219847) and next prime (20011219849).

It can be written as a sum of positive squares in only one way, i.e., 18187759044 + 1823460804 = 134862^2 + 42702^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20011219847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138966733 + ... + 138966876.

Almost surely, 2^20011219848 is an apocalyptic number.

It is an amenable number.

20011219848 is an abundant number, since it is smaller than the sum of its proper divisors (34185834102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011219848 is a wasteful number, since it uses less digits than its factorization.

20011219848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277933621 (or 277933614 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 20011219848 in words is "twenty billion, eleven million, two hundred nineteen thousand, eight hundred forty-eight".