20212313646 has 32 divisors (see below), whose sum is σ = 46383660288. Its totient is φ = 5751936000.

The previous prime is 20212313623. The next prime is 20212313683. The reversal of 20212313646 is 64631321202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948115 + ... + 969198.

It is an arithmetic number, because the mean of its divisors is an integer number (1449489384).

Almost surely, 2^20212313646 is an apocalyptic number.

20212313646 is an abundant number, since it is smaller than the sum of its proper divisors (26171346642).

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

20212313646 is a wasteful number, since it uses less digits than its factorization.

20212313646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917576.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 20212313646 its reverse (64631321202), we get a palindrome (84843634848).

The spelling of 20212313646 in words is "twenty billion, two hundred twelve million, three hundred thirteen thousand, six hundred forty-six".