21536200403 has 2 divisors, whose sum is σ = 21536200404. Its totient is φ = 21536200402.

The previous prime is 21536200379. The next prime is 21536200471. The reversal of 21536200403 is 30400263512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21536200403 is a prime.

It is not a weakly prime, because it can be changed into another prime (21536700403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10768100201 + 10768100202.

It is an arithmetic number, because the mean of its divisors is an integer number (10768100202).

Almost surely, 2^21536200403 is an apocalyptic number.

21536200403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21536200403 is an equidigital number, since it uses as much as digits as its factorization.

21536200403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21536200403 its reverse (30400263512), we get a palindrome (51936463915).

The spelling of 21536200403 in words is "twenty-one billion, five hundred thirty-six million, two hundred thousand, four hundred three".