21431200303 has 16 divisors (see below), whose sum is σ = 22355470080. Its totient is φ = 20519606016.

The previous prime is 21431200277. The next prime is 21431200321. The reversal of 21431200303 is 30300213412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21431200303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431200103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4817026 + ... + 4821472.

It is an arithmetic number, because the mean of its divisors is an integer number (1397216880).

Almost surely, 2^21431200303 is an apocalyptic number.

21431200303 is a deficient number, since it is larger than the sum of its proper divisors (924269777).

21431200303 is a wasteful number, since it uses less digits than its factorization.

21431200303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21431200303 its reverse (30300213412), we get a palindrome (51731413715).

The spelling of 21431200303 in words is "twenty-one billion, four hundred thirty-one million, two hundred thousand, three hundred three".