21325086 has 32 divisors (see below), whose sum is σ = 48921600. Its totient is φ = 6878520.

The previous prime is 21325037. The next prime is 21325093. The reversal of 21325086 is 68052312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4696 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (1528800).

Almost surely, 2^21325086 is an apocalyptic number.

21325086 is an abundant number, since it is smaller than the sum of its proper divisors (27596514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21325086 is a wasteful number, since it uses less digits than its factorization.

21325086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12781 (or 12775 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 21325086 is about 4617.9092671901. The cubic root of 21325086 is about 277.3087652490.

Adding to 21325086 its reverse (68052312), we get a palindrome (89377398).

The spelling of 21325086 in words is "twenty-one million, three hundred twenty-five thousand, eighty-six".