2106403656 has 32 divisors (see below), whose sum is σ = 6018296640. Its totient is φ = 601829568.

The previous prime is 2106403639. The next prime is 2106403667. The reversal of 2106403656 is 6563046012.

2106403656 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6268891 + ... + 6269226.

It is an arithmetic number, because the mean of its divisors is an integer number (188071770).

Almost surely, 2^2106403656 is an apocalyptic number.

It is an amenable number.

2106403656 is an abundant number, since it is smaller than the sum of its proper divisors (3911892984).

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

2106403656 is a wasteful number, since it uses less digits than its factorization.

2106403656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12538133 (or 12538129 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2106403656 is about 45895.5733813186. The cubic root of 2106403656 is about 1281.8794931198.

Adding to 2106403656 its reverse (6563046012), we get a palindrome (8669449668).

The spelling of 2106403656 in words is "two billion, one hundred six million, four hundred three thousand, six hundred fifty-six".