16540232403 has 8 divisors (see below), whose sum is σ = 22055539968. Its totient is φ = 11025873224.

The previous prime is 16540232347. The next prime is 16540232437. The reversal of 16540232403 is 30423204561.

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 16540232403 - 2³⁰ = 15466490579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16540232503) 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, 195351 + ... + 266912.

It is an arithmetic number, because the mean of its divisors is an integer number (2756942496).

Almost surely, 2^16540232403 is an apocalyptic number.

16540232403 is a deficient number, since it is larger than the sum of its proper divisors (5515307565).

16540232403 is a wasteful number, since it uses less digits than its factorization.

16540232403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474193.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 16540232403 its reverse (30423204561), we get a palindrome (46963436964).

The spelling of 16540232403 in words is "sixteen billion, five hundred forty million, two hundred thirty-two thousand, four hundred three".