20420404345052 has 12 divisors (see below), whose sum is σ = 35850613418256. Its totient is φ = 10177371939840.

The previous prime is 20420404344983. The next prime is 20420404345067. The reversal of 20420404345052 is 25054340402402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8207556773 + ... + 8207559260.

It is an arithmetic number, because the mean of its divisors is an integer number (2987551118188).

Almost surely, 2^{20420404345052} is an apocalyptic number.

It is an amenable number.

20420404345052 is a deficient number, since it is larger than the sum of its proper divisors (15430209073204).

20420404345052 is a wasteful number, since it uses less digits than its factorization.

20420404345052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16415116348 (or 16415116346 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 35.

Adding to 20420404345052 its reverse (25054340402402), we get a palindrome (45474744747454).

The spelling of 20420404345052 in words is "twenty trillion, four hundred twenty billion, four hundred four million, three hundred forty-five thousand, fifty-two".