20828094 has 64 divisors (see below), whose sum is σ = 52088832. Its totient is φ = 5414400.

The previous prime is 20828057. The next prime is 20828107. The reversal of 20828094 is 49082802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21664 + ... + 22604.

It is an arithmetic number, because the mean of its divisors is an integer number (813888).

Almost surely, 2^20828094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20828094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26044416).

20828094 is an abundant number, since it is smaller than the sum of its proper divisors (31260738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20828094 is a wasteful number, since it uses less digits than its factorization.

20828094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20828094 is about 4563.7806695765. The cubic root of 20828094 is about 275.1375356106.

The spelling of 20828094 in words is "twenty million, eight hundred twenty-eight thousand, ninety-four".