20469121402176 has 140 divisors (see below), whose sum is σ = 60728283945780. Its totient is φ = 6817261086720.

The previous prime is 20469121402111. The next prime is 20469121402201. The reversal of 20469121402176 is 67120412196402.

20469121402176 is a `hidden beast` number, since 2 + 0 + 4 + 69 + 12 + 1 + 402 + 176 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18901417075776 + 1567704326400 = 4347576^2 + 1252080^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4450620 + ... + 7793988.

Almost surely, 2^{20469121402176} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20469121402176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30364141972890).

20469121402176 is an abundant number, since it is smaller than the sum of its proper divisors (40259162543604).

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

20469121402176 is a wasteful number, since it uses less digits than its factorization.

20469121402176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344574 (or 3344555 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

Adding to 20469121402176 its reverse (67120412196402), we get a palindrome (87589533598578).

The spelling of 20469121402176 in words is "twenty trillion, four hundred sixty-nine billion, one hundred twenty-one million, four hundred two thousand, one hundred seventy-six".