21233548425 has 96 divisors (see below), whose sum is σ = 38407541760. Its totient is φ = 10321920000.

The previous prime is 21233548423. The next prime is 21233548429. The reversal of 21233548425 is 52484533212.

It is not a de Polignac number, because 21233548425 - 2¹ = 21233548423 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21233548421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2760585 + ... + 2768265.

It is an arithmetic number, because the mean of its divisors is an integer number (400078560).

Almost surely, 2^21233548425 is an apocalyptic number.

21233548425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21233548425 is a deficient number, since it is larger than the sum of its proper divisors (17173993335).

21233548425 is a wasteful number, since it uses less digits than its factorization.

21233548425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7795 (or 7790 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The spelling of 21233548425 in words is "twenty-one billion, two hundred thirty-three million, five hundred forty-eight thousand, four hundred twenty-five".