21096600825 has 48 divisors (see below), whose sum is σ = 35167392000. Its totient is φ = 11158963200.

The previous prime is 21096600821. The next prime is 21096600827. The reversal of 21096600825 is 52800669012.

It is not a de Polignac number, because 21096600825 - 2² = 21096600821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21096600821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11274640 + ... + 11276510.

It is an arithmetic number, because the mean of its divisors is an integer number (732654000).

Almost surely, 2^21096600825 is an apocalyptic number.

21096600825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21096600825 is a deficient number, since it is larger than the sum of its proper divisors (14070791175).

21096600825 is a wasteful number, since it uses less digits than its factorization.

21096600825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 21096600825 in words is "twenty-one billion, ninety-six million, six hundred thousand, eight hundred twenty-five".