20828807 has 8 divisors (see below), whose sum is σ = 22632960. Its totient is φ = 19095480.

The previous prime is 20828803. The next prime is 20828827. The reversal of 20828807 is 70882802.

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 20828807 - 2² = 20828803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20828803) 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, 17093 + ... + 18270.

It is an arithmetic number, because the mean of its divisors is an integer number (2829120).

Almost surely, 2^20828807 is an apocalyptic number.

20828807 is a deficient number, since it is larger than the sum of its proper divisors (1804153).

20828807 is a wasteful number, since it uses less digits than its factorization.

20828807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35413.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 20828807 is about 4563.8587839678. The cubic root of 20828807 is about 275.1406751334.

The spelling of 20828807 in words is "twenty million, eight hundred twenty-eight thousand, eight hundred seven".