20525001 has 16 divisors (see below), whose sum is σ = 33116544. Its totient is φ = 11038464.

The previous prime is 20524991. The next prime is 20525009. The reversal of 20525001 is 10052502.

It is not a de Polignac number, because 20525001 - 2⁶ = 20524937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20525009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28390 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (2069784).

Almost surely, 2^20525001 is an apocalyptic number.

20525001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20525001 is a deficient number, since it is larger than the sum of its proper divisors (12591543).

20525001 is a wasteful number, since it uses less digits than its factorization.

20525001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57520.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20525001 is about 4530.4526263940. The cubic root of 20525001 is about 273.7963971316.

Adding to 20525001 its reverse (10052502), we get a palindrome (30577503).

The spelling of 20525001 in words is "twenty million, five hundred twenty-five thousand, one".