21303002153 has 2 divisors, whose sum is σ = 21303002154. Its totient is φ = 21303002152.

The previous prime is 21303002101. The next prime is 21303002173. The reversal of 21303002153 is 35120030312.

It is an a-pointer prime, because the next prime (21303002173) can be obtained adding 21303002153 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19335458704 + 1967543449 = 139052^2 + 44357^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303002153 - 2¹⁸ = 21302740009 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303002173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651501076 + 10651501077.

It is an arithmetic number, because the mean of its divisors is an integer number (10651501077).

Almost surely, 2^21303002153 is an apocalyptic number.

It is an amenable number.

21303002153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303002153 is an equidigital number, since it uses as much as digits as its factorization.

21303002153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21303002153 its reverse (35120030312), we get a palindrome (56423032465).

The spelling of 21303002153 in words is "twenty-one billion, three hundred three million, two thousand, one hundred fifty-three".