21275848025 has 48 divisors (see below), whose sum is σ = 28068560640. Its totient is φ = 15952852800.

The previous prime is 21275848021. The next prime is 21275848037. The reversal of 21275848025 is 52084857212.

It is not a de Polignac number, because 21275848025 - 2² = 21275848021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21275848021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21910790 + ... + 21911760.

It is an arithmetic number, because the mean of its divisors is an integer number (584761680).

Almost surely, 2^21275848025 is an apocalyptic number.

21275848025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21275848025 is a deficient number, since it is larger than the sum of its proper divisors (6792712615).

21275848025 is a wasteful number, since it uses less digits than its factorization.

21275848025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 44.

The spelling of 21275848025 in words is "twenty-one billion, two hundred seventy-five million, eight hundred forty-eight thousand, twenty-five".