21602754203 has 2 divisors, whose sum is σ = 21602754204. Its totient is φ = 21602754202.

The previous prime is 21602754181. The next prime is 21602754221. The reversal of 21602754203 is 30245720612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21602754203 - 2²⁰ = 21601705627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21602754203.

It is not a weakly prime, because it can be changed into another prime (21602754253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801377101 + 10801377102.

It is an arithmetic number, because the mean of its divisors is an integer number (10801377102).

Almost surely, 2^21602754203 is an apocalyptic number.

21602754203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21602754203 is an equidigital number, since it uses as much as digits as its factorization.

21602754203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 21602754203 in words is "twenty-one billion, six hundred two million, seven hundred fifty-four thousand, two hundred three".