21400133403 has 16 divisors (see below), whose sum is σ = 31851363456. Its totient is φ = 12668154240.

The previous prime is 21400133387. The next prime is 21400133411. The reversal of 21400133403 is 30433100412.

It is not a de Polignac number, because 21400133403 - 2⁴ = 21400133387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21400133403.

It is not an unprimeable number, because it can be changed into a prime (21400133413) 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, 7539150 + ... + 7541987.

It is an arithmetic number, because the mean of its divisors is an integer number (1990710216).

Almost surely, 2^21400133403 is an apocalyptic number.

21400133403 is a deficient number, since it is larger than the sum of its proper divisors (10451230053).

21400133403 is a wasteful number, since it uses less digits than its factorization.

21400133403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15081194.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21400133403 its reverse (30433100412), we get a palindrome (51833233815).

The spelling of 21400133403 in words is "twenty-one billion, four hundred million, one hundred thirty-three thousand, four hundred three".