20140432505 has 8 divisors (see below), whose sum is σ = 24308222472. Its totient is φ = 16019210368.

The previous prime is 20140432489. The next prime is 20140432531. The reversal of 20140432505 is 50523404102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7021937209 + 13118495296 = 83797^2 + 114536^2 .

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 20140432505 - 2⁴ = 20140432489 is a prime.

It is a Duffinian 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, 11641004 + ... + 11642733.

It is an arithmetic number, because the mean of its divisors is an integer number (3038527809).

Almost surely, 2^20140432505 is an apocalyptic number.

It is an amenable number.

20140432505 is a deficient number, since it is larger than the sum of its proper divisors (4167789967).

20140432505 is a wasteful number, since it uses less digits than its factorization.

20140432505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23283915.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20140432505 its reverse (50523404102), we get a palindrome (70663836607).

The spelling of 20140432505 in words is "twenty billion, one hundred forty million, four hundred thirty-two thousand, five hundred five".