20012011012 has 36 divisors (see below), whose sum is σ = 40748958684. Its totient is φ = 8574424320.

The previous prime is 20012010983. The next prime is 20012011013. The reversal of 20012011012 is 21011021002.

It can be written as a sum of positive squares in 2 ways, for example, as 4819969476 + 15192041536 = 69426^2 + 123256^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20012011012.

It is not an unprimeable number, because it can be changed into a prime (20012011013) 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, 957312 + ... + 977992.

It is an arithmetic number, because the mean of its divisors is an integer number (1131915519).

Almost surely, 2^20012011012 is an apocalyptic number.

It is an amenable number.

20012011012 is an abundant number, since it is smaller than the sum of its proper divisors (20736947672).

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

20012011012 is a wasteful number, since it uses less digits than its factorization.

20012011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25636 (or 25627 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20012011012 its reverse (21011021002), we get a palindrome (41023032014).

The spelling of 20012011012 in words is "twenty billion, twelve million, eleven thousand, twelve".