20828774 has 8 divisors (see below), whose sum is σ = 33081048. Its totient is φ = 9801760.

The previous prime is 20828761. The next prime is 20828783. The reversal of 20828774 is 47782802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306272 + ... + 306339.

It is an arithmetic number, because the mean of its divisors is an integer number (4135131).

Almost surely, 2^20828774 is an apocalyptic number.

20828774 is a deficient number, since it is larger than the sum of its proper divisors (12252274).

20828774 is a wasteful number, since it uses less digits than its factorization.

20828774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612630.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 20828774 is about 4563.8551686047. The cubic root of 20828774 is about 275.1405298275.

It can be divided in two parts, 208 and 28774, that added together give a palindrome (28982).

The spelling of 20828774 in words is "twenty million, eight hundred twenty-eight thousand, seven hundred seventy-four".