21607435216153 has 2 divisors, whose sum is σ = 21607435216154. Its totient is φ = 21607435216152.

The previous prime is 21607435216123. The next prime is 21607435216183. The reversal of 21607435216153 is 35161253470612.

It is a balanced prime because it is at equal distance from previous prime (21607435216123) and next prime (21607435216183).

It can be written as a sum of positive squares in only one way, i.e., 21380756388489 + 226678827664 = 4623933^2 + 476108^2 .

It is a cyclic number.

It is not a de Polignac number, because 21607435216153 - 2¹³ = 21607435207961 is a prime.

It is not a weakly prime, because it can be changed into another prime (21607435216123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10803717608076 + 10803717608077.

It is an arithmetic number, because the mean of its divisors is an integer number (10803717608077).

Almost surely, 2^{21607435216153} is an apocalyptic number.

It is an amenable number.

21607435216153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21607435216153 is an equidigital number, since it uses as much as digits as its factorization.

21607435216153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

Adding to 21607435216153 its reverse (35161253470612), we get a palindrome (56768688686765).

The spelling of 21607435216153 in words is "twenty-one trillion, six hundred seven billion, four hundred thirty-five million, two hundred sixteen thousand, one hundred fifty-three".