20828156 has 48 divisors (see below), whose sum is σ = 40212480. Its totient is φ = 9408960.

The previous prime is 20828153. The next prime is 20828189. The reversal of 20828156 is 65182802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20828153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191030 + ... + 191138.

It is an arithmetic number, because the mean of its divisors is an integer number (837760).

Almost surely, 2^20828156 is an apocalyptic number.

It is an amenable number.

20828156 is a deficient number, since it is larger than the sum of its proper divisors (19384324).

20828156 is a wasteful number, since it uses less digits than its factorization.

20828156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20828156 is about 4563.7874621853. The cubic root of 20828156 is about 275.1378086155.

The spelling of 20828156 in words is "twenty million, eight hundred twenty-eight thousand, one hundred fifty-six".