21285325803 has 32 divisors (see below), whose sum is σ = 33503887360. Its totient is φ = 11762664480.

The previous prime is 21285325801. The next prime is 21285325819. The reversal of 21285325803 is 30852358212.

It is not a de Polignac number, because 21285325803 - 2¹ = 21285325801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21285325801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1017576 + ... + 1038282.

It is an arithmetic number, because the mean of its divisors is an integer number (1046996480).

Almost surely, 2^21285325803 is an apocalyptic number.

21285325803 is a deficient number, since it is larger than the sum of its proper divisors (12218561557).

21285325803 is a wasteful number, since it uses less digits than its factorization.

21285325803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22327.

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 21285325803 in words is "twenty-one billion, two hundred eighty-five million, three hundred twenty-five thousand, eight hundred three".