20355126401656 has 16 divisors (see below), whose sum is σ = 40410912709440. Its totient is φ = 9578883012480.

The previous prime is 20355126401573. The next prime is 20355126401719. The reversal of 20355126401656 is 65610462155302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74835023400 + ... + 74835023671.

It is an arithmetic number, because the mean of its divisors is an integer number (2525682044340).

Almost surely, 2^{20355126401656} is an apocalyptic number.

It is an amenable number.

20355126401656 is a deficient number, since it is larger than the sum of its proper divisors (20055786307784).

20355126401656 is a wasteful number, since it uses less digits than its factorization.

20355126401656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149670047094 (or 149670047090 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

Adding to 20355126401656 its reverse (65610462155302), we get a palindrome (85965588556958).

The spelling of 20355126401656 in words is "twenty trillion, three hundred fifty-five billion, one hundred twenty-six million, four hundred one thousand, six hundred fifty-six".