20424400055405 has 8 divisors (see below), whose sum is σ = 24685605823200. Its totient is φ = 16221969539856.

The previous prime is 20424400055377. The next prime is 20424400055441. The reversal of 20424400055405 is 50455000442402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20424400055405 - 2¹⁰ = 20424400054381 is a prime.

It is a super-2 number, since 2×20424400055405² (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 7 ways as a sum of consecutive naturals, for example, 14693812295 + ... + 14693813684.

It is an arithmetic number, because the mean of its divisors is an integer number (3085700727900).

Almost surely, 2^{20424400055405} is an apocalyptic number.

It is an amenable number.

20424400055405 is a deficient number, since it is larger than the sum of its proper divisors (4261205767795).

20424400055405 is a wasteful number, since it uses less digits than its factorization.

20424400055405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29387626123.

The product of its (nonzero) digits is 128000, while the sum is 35.

Adding to 20424400055405 its reverse (50455000442402), we get a palindrome (70879400497807).

The spelling of 20424400055405 in words is "twenty trillion, four hundred twenty-four billion, four hundred million, fifty-five thousand, four hundred five".