20822730 has 16 divisors (see below), whose sum is σ = 49974624. Its totient is φ = 5552720.

The previous prime is 20822717. The next prime is 20822821. The reversal of 20822730 is 3722802.

It is a self number, because there is not a number n which added to its sum of digits gives 20822730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347016 + ... + 347075.

It is an arithmetic number, because the mean of its divisors is an integer number (3123414).

Almost surely, 2^20822730 is an apocalyptic number.

20822730 is an abundant number, since it is smaller than the sum of its proper divisors (29151894).

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

20822730 is a wasteful number, since it uses less digits than its factorization.

20822730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694101.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20822730 is about 4563.1929610745. The cubic root of 20822730 is about 275.1139142389.

The spelling of 20822730 in words is "twenty million, eight hundred twenty-two thousand, seven hundred thirty".