20020243408 has 80 divisors (see below), whose sum is σ = 43418935296. Its totient is φ = 8863989120.

The previous prime is 20020243367. The next prime is 20020243417. The reversal of 20020243408 is 80434202002.

It is a super-2 number, since 2×20020243408² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2895091 + ... + 2901997.

Almost surely, 2^20020243408 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 20020243408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21709467648).

20020243408 is an abundant number, since it is smaller than the sum of its proper divisors (23398691888).

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

20020243408 is a wasteful number, since it uses less digits than its factorization.

20020243408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7352 (or 7346 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The spelling of 20020243408 in words is "twenty billion, twenty million, two hundred forty-three thousand, four hundred eight".