20653772 has 6 divisors (see below), whose sum is σ = 36144108. Its totient is φ = 10326884.

The previous prime is 20653769. The next prime is 20653777. The reversal of 20653772 is 27735602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20653777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581718 + ... + 2581725.

It is an arithmetic number, because the mean of its divisors is an integer number (6024018).

Almost surely, 2^20653772 is an apocalyptic number.

It is an amenable number.

20653772 is a deficient number, since it is larger than the sum of its proper divisors (15490336).

20653772 is a wasteful number, since it uses less digits than its factorization.

20653772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163447 (or 5163445 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 20653772 is about 4544.6421201234. The cubic root of 20653772 is about 274.3677906758.

The spelling of 20653772 in words is "twenty million, six hundred fifty-three thousand, seven hundred seventy-two".