20424632443420 has 96 divisors (see below), whose sum is σ = 47399107996800. Its totient is φ = 7353439002624.

The previous prime is 20424632443417. The next prime is 20424632443469. The reversal of 20424632443420 is 2434423642402.

It is a super-2 number, since 2×20424632443420² (a number of 27 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 31 ways as a sum of consecutive naturals, for example, 37964866 + ... + 38499094.

It is an arithmetic number, because the mean of its divisors is an integer number (493740708300).

Almost surely, 2^{20424632443420} is an apocalyptic number.

20424632443420 is a gapful number since it is divisible by the number (20) 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 20424632443420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23699553998400).

20424632443420 is an abundant number, since it is smaller than the sum of its proper divisors (26974475553380).

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

20424632443420 is a wasteful number, since it uses less digits than its factorization.

20424632443420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539167 (or 539165 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 40.

The spelling of 20424632443420 in words is "twenty trillion, four hundred twenty-four billion, six hundred thirty-two million, four hundred forty-three thousand, four hundred twenty".