20880207 has 8 divisors (see below), whose sum is σ = 30933680. Its totient is φ = 13920120.

The previous prime is 20880191. The next prime is 20880257. The reversal of 20880207 is 70208802.

It is not a de Polignac number, because 20880207 - 2⁴ = 20880191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 773341 = 20880207 / (2 + 0 + 8 + 8 + 0 + 2 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880257) 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, 386644 + ... + 386697.

It is an arithmetic number, because the mean of its divisors is an integer number (3866710).

Almost surely, 2^20880207 is an apocalyptic number.

20880207 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20880207 is a deficient number, since it is larger than the sum of its proper divisors (10053473).

20880207 is an equidigital number, since it uses as much as digits as its factorization.

20880207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773350 (or 773344 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 20880207 is about 4569.4865138219. The cubic root of 20880207 is about 275.3668140816.

The spelling of 20880207 in words is "twenty million, eight hundred eighty thousand, two hundred seven".