20531443407 has 8 divisors (see below), whose sum is σ = 27443526960. Its totient is φ = 13653494400.

The previous prime is 20531443381. The next prime is 20531443411. The reversal of 20531443407 is 70434413502.

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

It is not a de Polignac number, because 20531443407 - 2⁷ = 20531443279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531443417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8532232 + ... + 8534637.

It is an arithmetic number, because the mean of its divisors is an integer number (3430440870).

Almost surely, 2^20531443407 is an apocalyptic number.

20531443407 is a deficient number, since it is larger than the sum of its proper divisors (6912083553).

20531443407 is a wasteful number, since it uses less digits than its factorization.

20531443407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17067273.

The product of its (nonzero) digits is 40320, while the sum is 33.

Adding to 20531443407 its reverse (70434413502), we get a palindrome (90965856909).

The spelling of 20531443407 in words is "twenty billion, five hundred thirty-one million, four hundred forty-three thousand, four hundred seven".