20525407 has 8 divisors (see below), whose sum is σ = 24477696. Its totient is φ = 16828152.

The previous prime is 20525399. The next prime is 20525411. The reversal of 20525407 is 70452502.

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

It is a cyclic number.

It is not a de Polignac number, because 20525407 - 2³ = 20525399 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 (20525437) 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, 63583 + ... + 63904.

It is an arithmetic number, because the mean of its divisors is an integer number (3059712).

Almost surely, 2^20525407 is an apocalyptic number.

20525407 is a deficient number, since it is larger than the sum of its proper divisors (3952289).

20525407 is a wasteful number, since it uses less digits than its factorization.

20525407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127517.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20525407 is about 4530.4974340573. The cubic root of 20525407 is about 273.7982024194.

Adding to 20525407 its reverse (70452502), we get a palindrome (90977909).

The spelling of 20525407 in words is "twenty million, five hundred twenty-five thousand, four hundred seven".