21416632325 has 48 divisors (see below), whose sum is σ = 30913944000. Its totient is φ = 14553561600.

The previous prime is 21416632319. The next prime is 21416632357. The reversal of 21416632325 is 52323661412.

It is not a de Polignac number, because 21416632325 - 2⁶ = 21416632261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 353351 + ... + 409499.

It is an arithmetic number, because the mean of its divisors is an integer number (644040500).

Almost surely, 2^21416632325 is an apocalyptic number.

21416632325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21416632325 is a deficient number, since it is larger than the sum of its proper divisors (9497311675).

21416632325 is a wasteful number, since it uses less digits than its factorization.

21416632325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56262 (or 56257 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The spelling of 21416632325 in words is "twenty-one billion, four hundred sixteen million, six hundred thirty-two thousand, three hundred twenty-five".