20040707 has 4 divisors (see below), whose sum is σ = 20380440. Its totient is φ = 19700976.

The previous prime is 20040703. The next prime is 20040733. The reversal of 20040707 is 70704002.

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 20040707 - 2² = 20040703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20040701) 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, 169778 + ... + 169895.

It is an arithmetic number, because the mean of its divisors is an integer number (5095110).

Almost surely, 2^20040707 is an apocalyptic number.

20040707 is a deficient number, since it is larger than the sum of its proper divisors (339733).

20040707 is an equidigital number, since it uses as much as digits as its factorization.

20040707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339732.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 20040707 is about 4476.6848224998. The cubic root of 20040707 is about 271.6257965207.

Adding to 20040707 its reverse (70704002), we get a palindrome (90744709).

The spelling of 20040707 in words is "twenty million, forty thousand, seven hundred seven".