20401012206 has 48 divisors (see below), whose sum is σ = 44360110080. Its totient is φ = 6776087760.

The previous prime is 20401012189. The next prime is 20401012211. The reversal of 20401012206 is 60221010402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9663091 + ... + 9665201.

It is an arithmetic number, because the mean of its divisors is an integer number (924168960).

Almost surely, 2^20401012206 is an apocalyptic number.

20401012206 is an abundant number, since it is smaller than the sum of its proper divisors (23959097874).

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

20401012206 is a wasteful number, since it uses less digits than its factorization.

20401012206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781 (or 3778 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20401012206 its reverse (60221010402), we get a palindrome (80622022608).

The spelling of 20401012206 in words is "twenty billion, four hundred one million, twelve thousand, two hundred six".