20355253424016 has 60 divisors (see below), whose sum is σ = 61169613612912. Its totient is φ = 5815786691904.

The previous prime is 20355253423991. The next prime is 20355253424029. The reversal of 20355253424016 is 61042435255302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4327219890 + ... + 4327224593.

Almost surely, 2^{20355253424016} is an apocalyptic number.

It is an amenable number.

20355253424016 is an abundant number, since it is smaller than the sum of its proper divisors (40814360188896).

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

20355253424016 is a wasteful number, since it uses less digits than its factorization.

20355253424016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8654444508 (or 8654444495 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 20355253424016 its reverse (61042435255302), we get a palindrome (81397688679318).

The spelling of 20355253424016 in words is "twenty trillion, three hundred fifty-five billion, two hundred fifty-three million, four hundred twenty-four thousand, sixteen".