20826801 has 32 divisors (see below), whose sum is σ = 31881600. Its totient is φ = 13600224.

The previous prime is 20826797. The next prime is 20826809. The reversal of 20826801 is 10862802.

It is not a de Polignac number, because 20826801 - 2² = 20826797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20826809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194590 + ... + 194696.

It is an arithmetic number, because the mean of its divisors is an integer number (996300).

Almost surely, 2^20826801 is an apocalyptic number.

It is an amenable number.

20826801 is a deficient number, since it is larger than the sum of its proper divisors (11054799).

20826801 is an frugal number, since it uses more digits than its factorization.

20826801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20826801 is about 4563.6390085106. The cubic root of 20826801 is about 275.1318420156.

The spelling of 20826801 in words is "twenty million, eight hundred twenty-six thousand, eight hundred one".