20090807 has 8 divisors (see below), whose sum is σ = 21969792. Its totient is φ = 18220600.

The previous prime is 20090801. The next prime is 20090813. The reversal of 20090807 is 70809002.

It is an interprime number because it is at equal distance from previous prime (20090801) and next prime (20090813).

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 20090807 - 2⁶ = 20090743 is a prime.

It is a super-2 number, since 2×20090807² = 807281051822498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090801) 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, 3182 + ... + 7092.

It is an arithmetic number, because the mean of its divisors is an integer number (2746224).

Almost surely, 2^20090807 is an apocalyptic number.

20090807 is a deficient number, since it is larger than the sum of its proper divisors (1878985).

20090807 is a wasteful number, since it uses less digits than its factorization.

20090807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20090807 is about 4482.2769883174. The cubic root of 20090807 is about 271.8519550115.

Adding to 20090807 its reverse (70809002), we get a palindrome (90899809).

The spelling of 20090807 in words is "twenty million, ninety thousand, eight hundred seven".