21344153025 has 48 divisors (see below), whose sum is σ = 40003759040. Its totient is φ = 9954835200.

The previous prime is 21344152943. The next prime is 21344153071. The reversal of 21344153025 is 52035144312.

It is not a de Polignac number, because 21344153025 - 2¹⁶ = 21344087489 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21344152983 and 21344153001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 557566 + ... + 594615.

Almost surely, 2^21344153025 is an apocalyptic number.

21344153025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21344153025 is a deficient number, since it is larger than the sum of its proper divisors (18659606015).

21344153025 is a wasteful number, since it uses less digits than its factorization.

21344153025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152226 (or 1152221 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21344153025 its reverse (52035144312), we get a palindrome (73379297337).

The spelling of 21344153025 in words is "twenty-one billion, three hundred forty-four million, one hundred fifty-three thousand, twenty-five".