20010211020 has 36 divisors (see below), whose sum is σ = 60697640640. Its totient is φ = 5336056224.

The previous prime is 20010210971. The next prime is 20010211027. The reversal of 20010211020 is 2011201002.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20010210993 and 20010211011.

It is not an unprimeable number, because it can be changed into a prime (20010211027) 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 11 ways as a sum of consecutive naturals, for example, 55583740 + ... + 55584099.

Almost surely, 2^20010211020 is an apocalyptic number.

20010211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010211020 is an abundant number, since it is smaller than the sum of its proper divisors (40687429620).

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

20010211020 is a wasteful number, since it uses less digits than its factorization.

20010211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111167854 (or 111167849 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010211020 its reverse (2011201002), we get a palindrome (22021412022).

The spelling of 20010211020 in words is "twenty billion, ten million, two hundred eleven thousand, twenty".