21403203133 has 16 divisors (see below), whose sum is σ = 24412449600. Its totient is φ = 18589314816.

The previous prime is 21403203103. The next prime is 21403203137. The reversal of 21403203133 is 33130230412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21403203133 is a prime.

It is a super-2 number, since 2×21403203133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403203137) 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, 894066 + ... + 917692.

It is an arithmetic number, because the mean of its divisors is an integer number (1525778100).

Almost surely, 2^21403203133 is an apocalyptic number.

It is an amenable number.

21403203133 is a deficient number, since it is larger than the sum of its proper divisors (3009246467).

21403203133 is a wasteful number, since it uses less digits than its factorization.

21403203133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27756.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21403203133 its reverse (33130230412), we get a palindrome (54533433545).

The spelling of 21403203133 in words is "twenty-one billion, four hundred three million, two hundred three thousand, one hundred thirty-three".