20011211110 has 24 divisors (see below), whose sum is σ = 39592431648. Its totient is φ = 7276803600.

The previous prime is 20011211083. The next prime is 20011211117. The reversal of 20011211110 is 1111211002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011211117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8267886 + ... + 8270305.

It is an arithmetic number, because the mean of its divisors is an integer number (1649684652).

Almost surely, 2^20011211110 is an apocalyptic number.

20011211110 is a deficient number, since it is larger than the sum of its proper divisors (19581220538).

20011211110 is a wasteful number, since it uses less digits than its factorization.

20011211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16538220 (or 16538209 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011211110 its reverse (1111211002), we get a palindrome (21122422112).

The spelling of 20011211110 in words is "twenty billion, eleven million, two hundred eleven thousand, one hundred ten".