20507001 has 16 divisors (see below), whose sum is σ = 28385280. Its totient is φ = 13159440.

The previous prime is 20506999. The next prime is 20507009. The reversal of 20507001 is 10070502.

It is a happy number.

It is not a de Polignac number, because 20507001 - 2¹ = 20506999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20507009) 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, 8040 + ... + 10278.

It is an arithmetic number, because the mean of its divisors is an integer number (1774080).

Almost surely, 2^20507001 is an apocalyptic number.

It is an amenable number.

20507001 is a deficient number, since it is larger than the sum of its proper divisors (7878279).

20507001 is a wasteful number, since it uses less digits than its factorization.

20507001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 20507001 is about 4528.4656341856. The cubic root of 20507001 is about 273.7163358032.

Adding to 20507001 its reverse (10070502), we get a palindrome (30577503).

The spelling of 20507001 in words is "twenty million, five hundred seven thousand, one".