21802230153 has 12 divisors (see below), whose sum is σ = 34355029488. Its totient is φ = 13213472760.

The previous prime is 21802230137. The next prime is 21802230169. The reversal of 21802230153 is 35103220812.

It is an interprime number because it is at equal distance from previous prime (21802230137) and next prime (21802230169).

It is not a de Polignac number, because 21802230153 - 2⁴ = 21802230137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21802230103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110112175 + ... + 110112372.

It is an arithmetic number, because the mean of its divisors is an integer number (2862919124).

Almost surely, 2^21802230153 is an apocalyptic number.

It is an amenable number.

21802230153 is a deficient number, since it is larger than the sum of its proper divisors (12552799335).

21802230153 is a wasteful number, since it uses less digits than its factorization.

21802230153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220224564 (or 220224561 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21802230153 its reverse (35103220812), we get a palindrome (56905450965).

The spelling of 21802230153 in words is "twenty-one billion, eight hundred two million, two hundred thirty thousand, one hundred fifty-three".