21343232403 has 64 divisors (see below), whose sum is σ = 34447662720. Its totient is φ = 13005950976.

The previous prime is 21343232381. The next prime is 21343232413. The reversal of 21343232403 is 30423234312.

21343232403 is a `hidden beast` number, since 21 + 3 + 4 + 3 + 232 + 403 = 666.

It is not a de Polignac number, because 21343232403 - 2⁵ = 21343232371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21343232413) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14893375 + ... + 14894807.

It is an arithmetic number, because the mean of its divisors is an integer number (538244730).

Almost surely, 2^21343232403 is an apocalyptic number.

21343232403 is a deficient number, since it is larger than the sum of its proper divisors (13104430317).

21343232403 is a wasteful number, since it uses less digits than its factorization.

21343232403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21343232403 its reverse (30423234312), we get a palindrome (51766466715).

The spelling of 21343232403 in words is "twenty-one billion, three hundred forty-three million, two hundred thirty-two thousand, four hundred three".