20911052 has 12 divisors (see below), whose sum is σ = 37373280. Its totient is φ = 10232976.

The previous prime is 20911043. The next prime is 20911067. The reversal of 20911052 is 25011902.

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, 55427 + ... + 55802.

It is an arithmetic number, because the mean of its divisors is an integer number (3114440).

Almost surely, 2^20911052 is an apocalyptic number.

It is an amenable number.

20911052 is a deficient number, since it is larger than the sum of its proper divisors (16462228).

20911052 is a wasteful number, since it uses less digits than its factorization.

20911052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111280 (or 111278 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 20911052 is about 4572.8603739891. The cubic root of 20911052 is about 275.5023413207.

Adding to 20911052 its reverse (25011902), we get a palindrome (45922954).

The spelling of 20911052 in words is "twenty million, nine hundred eleven thousand, fifty-two".