21232607 has 4 divisors (see below), whose sum is σ = 23162856. Its totient is φ = 19302360.

The previous prime is 21232571. The next prime is 21232639. The reversal of 21232607 is 70623212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21232607 - 2¹⁰ = 21231583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965108 + ... + 965129.

It is an arithmetic number, because the mean of its divisors is an integer number (5790714).

Almost surely, 2^21232607 is an apocalyptic number.

21232607 is a deficient number, since it is larger than the sum of its proper divisors (1930249).

21232607 is a wasteful number, since it uses less digits than its factorization.

21232607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930248.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21232607 is about 4607.8853067324. The cubic root of 21232607 is about 276.9073225823.

Adding to 21232607 its reverse (70623212), we get a palindrome (91855819).

The spelling of 21232607 in words is "twenty-one million, two hundred thirty-two thousand, six hundred seven".