21325011 has 8 divisors (see below), whose sum is σ = 29929920. Its totient is φ = 13468392.

The previous prime is 21324983. The next prime is 21325013. The reversal of 21325011 is 11052312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21325011 - 2⁷ = 21324883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21325013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187005 + ... + 187118.

It is an arithmetic number, because the mean of its divisors is an integer number (3741240).

Almost surely, 2^21325011 is an apocalyptic number.

21325011 is a deficient number, since it is larger than the sum of its proper divisors (8604909).

21325011 is a wasteful number, since it uses less digits than its factorization.

21325011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374145.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 21325011 is about 4617.9011466249. The cubic root of 21325011 is about 277.3084401517.

Adding to 21325011 its reverse (11052312), we get a palindrome (32377323).

The spelling of 21325011 in words is "twenty-one million, three hundred twenty-five thousand, eleven".