21451650325 has 12 divisors (see below), whose sum is σ = 30400053280. Its totient is φ = 14709702960.

The previous prime is 21451650323. The next prime is 21451650347. The reversal of 21451650325 is 52305615412.

It is not a de Polignac number, because 21451650325 - 2¹ = 21451650323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21451650323) 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, 61290255 + ... + 61290604.

Almost surely, 2^21451650325 is an apocalyptic number.

21451650325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21451650325 is a deficient number, since it is larger than the sum of its proper divisors (8948402955).

21451650325 is a wasteful number, since it uses less digits than its factorization.

21451650325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122580876 (or 122580871 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 21451650325 in words is "twenty-one billion, four hundred fifty-one million, six hundred fifty thousand, three hundred twenty-five".