21302441025 has 12 divisors (see below), whose sum is σ = 35220035952. Its totient is φ = 11361301840.

The previous prime is 21302441011. The next prime is 21302441029. The reversal of 21302441025 is 52014420312.

It is not a de Polignac number, because 21302441025 - 2⁶ = 21302440961 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21302440986 and 21302441004.

It is not an unprimeable number, because it can be changed into a prime (21302441029) 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, 142016199 + ... + 142016348.

It is an arithmetic number, because the mean of its divisors is an integer number (2935002996).

Almost surely, 2^21302441025 is an apocalyptic number.

21302441025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21302441025 is a deficient number, since it is larger than the sum of its proper divisors (13917594927).

21302441025 is a wasteful number, since it uses less digits than its factorization.

21302441025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284032560 (or 284032555 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21302441025 its reverse (52014420312), we get a palindrome (73316861337).

It can be divided in two parts, 2130 and 2441025, that added together give a triangular number (2443155 = T₂₂₁₀).

The spelling of 21302441025 in words is "twenty-one billion, three hundred two million, four hundred forty-one thousand, twenty-five".