20949852 has 144 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 5241600.

The previous prime is 20949833. The next prime is 20949857. The reversal of 20949852 is 25894902.

It is a self number, because there is not a number n which added to its sum of digits gives 20949852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20949857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 265149 + ... + 265227.

It is an arithmetic number, because the mean of its divisors is an integer number (446880).

Almost surely, 2^20949852 is an apocalyptic number.

20949852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20949852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

20949852 is an abundant number, since it is smaller than the sum of its proper divisors (43400868).

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

20949852 is a wasteful number, since it uses less digits than its factorization.

20949852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20949852 is about 4577.1008291275. The cubic root of 20949852 is about 275.6726322315.

The spelling of 20949852 in words is "twenty million, nine hundred forty-nine thousand, eight hundred fifty-two".