20132507 has 4 divisors (see below), whose sum is σ = 20150736. Its totient is φ = 20114280.

The previous prime is 20132503. The next prime is 20132509. The reversal of 20132507 is 70523102.

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

It is a cyclic number.

It is not a de Polignac number, because 20132507 - 2² = 20132503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20132503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7343 + ... + 9704.

It is an arithmetic number, because the mean of its divisors is an integer number (5037684).

Almost surely, 2^20132507 is an apocalyptic number.

20132507 is a deficient number, since it is larger than the sum of its proper divisors (18229).

20132507 is a wasteful number, since it uses less digits than its factorization.

20132507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18228.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20132507 is about 4486.9262307286. The cubic root of 20132507 is about 272.0399081798.

Adding to 20132507 its reverse (70523102), we get a palindrome (90655609).

The spelling of 20132507 in words is "twenty million, one hundred thirty-two thousand, five hundred seven".