20420953946412 has 72 divisors (see below), whose sum is σ = 47862660933360. Its totient is φ = 6776579863680.

The previous prime is 20420953946383. The next prime is 20420953946509. The reversal of 20420953946412 is 21464935902402.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1385309362 + ... + 1385324102.

It is an arithmetic number, because the mean of its divisors is an integer number (664759179630).

Almost surely, 2^{20420953946412} is an apocalyptic number.

It is an amenable number.

20420953946412 is an abundant number, since it is smaller than the sum of its proper divisors (27441706986948).

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

20420953946412 is a wasteful number, since it uses less digits than its factorization.

20420953946412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16943 (or 16678 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 20420953946412 in words is "twenty trillion, four hundred twenty billion, nine hundred fifty-three million, nine hundred forty-six thousand, four hundred twelve".