20020011012 has 18 divisors (see below), whose sum is σ = 50606139038. Its totient is φ = 6673336992.

The previous prime is 20020010963. The next prime is 20020011043. The reversal of 20020011012 is 21011002002.

It can be written as a sum of positive squares in only one way, i.e., 17703899136 + 2316111876 = 133056^2 + 48126^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 = 20020010985 and 20020011003.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278055673 + ... + 278055744.

Almost surely, 2^20020011012 is an apocalyptic number.

It is an amenable number.

20020011012 is an abundant number, since it is smaller than the sum of its proper divisors (30586128026).

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

20020011012 is a wasteful number, since it uses less digits than its factorization.

20020011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556111427 (or 556111422 counting only the distinct ones).

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

Adding to 20020011012 its reverse (21011002002), we get a palindrome (41031013014).

The spelling of 20020011012 in words is "twenty billion, twenty million, eleven thousand, twelve".