20043400445 has 8 divisors (see below), whose sum is σ = 24145669944. Its totient is φ = 15972327424.

The previous prime is 20043400427. The next prime is 20043400457. The reversal of 20043400445 is 54400434002.

It can be written as a sum of positive squares in 4 ways, for example, as 1911700729 + 18131699716 = 43723^2 + 134654^2 .

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 20043400445 - 2¹⁸ = 20043138301 is a prime.

It is a Duffinian number.

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, 7797704 + ... + 7800273.

It is an arithmetic number, because the mean of its divisors is an integer number (3018208743).

Almost surely, 2^20043400445 is an apocalyptic number.

It is an amenable number.

20043400445 is a deficient number, since it is larger than the sum of its proper divisors (4102269499).

20043400445 is a wasteful number, since it uses less digits than its factorization.

20043400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15598239.

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 20043400445 its reverse (54400434002), we get a palindrome (74443834447).

The spelling of 20043400445 in words is "twenty billion, forty-three million, four hundred thousand, four hundred forty-five".