20011211019 has 48 divisors (see below), whose sum is σ = 30546367488. Its totient is φ = 12598983936.

The previous prime is 20011210993. The next prime is 20011211021. The reversal of 20011211019 is 91011211002.

It is a happy number.

It is not a de Polignac number, because 20011211019 - 2⁵ = 20011210987 is a prime.

It is a super-2 number, since 2×20011211019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011210992 and 20011211010.

It is not an unprimeable number, because it can be changed into a prime (20011211039) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6618142 + ... + 6621164.

It is an arithmetic number, because the mean of its divisors is an integer number (636382656).

Almost surely, 2^20011211019 is an apocalyptic number.

20011211019 is a deficient number, since it is larger than the sum of its proper divisors (10535156469).

20011211019 is a wasteful number, since it uses less digits than its factorization.

20011211019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448 (or 3445 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 20011211019 in words is "twenty billion, eleven million, two hundred eleven thousand, nineteen".