20420400202244 has 12 divisors (see below), whose sum is σ = 40840800404544. Its totient is φ = 8751600086664.

The previous prime is 20420400202183. The next prime is 20420400202261. The reversal of 20420400202244 is 44220200402402.

20420400202244 is an admirable number.

It is a super-2 number, since 2×20420400202244² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364650003584 + ... + 364650003639.

It is an arithmetic number, because the mean of its divisors is an integer number (3403400033712).

Almost surely, 2^{20420400202244} is an apocalyptic number.

It is an amenable number.

20420400202244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20420400202244 is a wasteful number, since it uses less digits than its factorization.

20420400202244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729300007234 (or 729300007232 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20420400202244 its reverse (44220200402402), we get a palindrome (64640600604646).

The spelling of 20420400202244 in words is "twenty trillion, four hundred twenty billion, four hundred million, two hundred two thousand, two hundred forty-four".