20402244444220 has 48 divisors (see below), whose sum is σ = 42890048697888. Its totient is φ = 8152266003200.

The previous prime is 20402244444209. The next prime is 20402244444277. The reversal of 20402244444220 is 2244444220402.

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, 94415619 + ... + 94631461.

It is an arithmetic number, because the mean of its divisors is an integer number (893542681206).

Almost surely, 2^{20402244444220} is an apocalyptic number.

20402244444220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402244444220 is an abundant number, since it is smaller than the sum of its proper divisors (22487804253668).

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

20402244444220 is a wasteful number, since it uses less digits than its factorization.

20402244444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220830 (or 220828 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 20402244444220 its reverse (2244444220402), we get a palindrome (22646688664622).

The spelling of 20402244444220 in words is "twenty trillion, four hundred two billion, two hundred forty-four million, four hundred forty-four thousand, two hundred twenty".