20424240343400 has 48 divisors (see below), whose sum is σ = 47620881225900. Its totient is φ = 8146552494080.

The previous prime is 20424240343373. The next prime is 20424240343427. The reversal of 20424240343400 is 434304242402.

It is an interprime number because it is at equal distance from previous prime (20424240343373) and next prime (20424240343427).

It can be written as a sum of positive squares in 6 ways, for example, as 12909174728356 + 7515065615044 = 3592934^2 + 2741362^2 .

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, 144576995 + ... + 144718194.

Almost surely, 2^{20424240343400} is an apocalyptic number.

20424240343400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424240343400 is an abundant number, since it is smaller than the sum of its proper divisors (27196640882500).

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

20424240343400 is a wasteful number, since it uses less digits than its factorization.

20424240343400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289295558 (or 289295549 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 20424240343400 its reverse (434304242402), we get a palindrome (20858544585802).

The spelling of 20424240343400 in words is "twenty trillion, four hundred twenty-four billion, two hundred forty million, three hundred forty-three thousand, four hundred".