20353404170424 has 256 divisors, whose sum is σ = 55390040455680. Its totient is φ = 6195319603200.

The previous prime is 20353404170339. The next prime is 20353404170441. The reversal of 20353404170424 is 42407140435302.

It is a super-3 number, since 3×20353404170424³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12712931224 + ... + 12712932824.

It is an arithmetic number, because the mean of its divisors is an integer number (216367345530).

Almost surely, 2^{20353404170424} is an apocalyptic number.

20353404170424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20353404170424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27695020227840).

20353404170424 is an abundant number, since it is smaller than the sum of its proper divisors (35036636285256).

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

20353404170424 is a wasteful number, since it uses less digits than its factorization.

20353404170424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790 (or 2786 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 39.

The spelling of 20353404170424 in words is "twenty trillion, three hundred fifty-three billion, four hundred four million, one hundred seventy thousand, four hundred twenty-four".