20247442023405 has 64 divisors (see below), whose sum is σ = 34321889691648. Its totient is φ = 10171131759360.

The previous prime is 20247442023397. The next prime is 20247442023407. The reversal of 20247442023405 is 50432024474202.

It is not a de Polignac number, because 20247442023405 - 2³ = 20247442023397 is a prime.

It is a super-2 number, since 2×20247442023405² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247442023407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61715250 + ... + 62042460.

It is an arithmetic number, because the mean of its divisors is an integer number (536279526432).

Almost surely, 2^{20247442023405} is an apocalyptic number.

It is an amenable number.

20247442023405 is a deficient number, since it is larger than the sum of its proper divisors (14074447668243).

20247442023405 is a wasteful number, since it uses less digits than its factorization.

20247442023405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329986.

The product of its (nonzero) digits is 430080, while the sum is 39.

Adding to 20247442023405 its reverse (50432024474202), we get a palindrome (70679466497607).

The spelling of 20247442023405 in words is "twenty trillion, two hundred forty-seven billion, four hundred forty-two million, twenty-three thousand, four hundred five".