21434231403 has 24 divisors (see below), whose sum is σ = 33347660528. Its totient is φ = 13188111552.

The previous prime is 21434231347. The next prime is 21434231407. The reversal of 21434231403 is 30413243412.

21434231403 is a `hidden beast` number, since 2 + 1 + 4 + 342 + 314 + 0 + 3 = 666.

It is not a de Polignac number, because 21434231403 - 2⁶ = 21434231339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21434231407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 962076 + ... + 984102.

Almost surely, 2^21434231403 is an apocalyptic number.

21434231403 is a deficient number, since it is larger than the sum of its proper divisors (11913429125).

21434231403 is a wasteful number, since it uses less digits than its factorization.

21434231403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30363 (or 30360 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21434231403 its reverse (30413243412), we get a palindrome (51847474815).

The spelling of 21434231403 in words is "twenty-one billion, four hundred thirty-four million, two hundred thirty-one thousand, four hundred three".