20997052 has 12 divisors (see below), whose sum is σ = 38678920. Its totient is φ = 9945936.

The previous prime is 20997047. The next prime is 20997059. The reversal of 20997052 is 25079902.

It is a junction number, because it is equal to n+sod(n) for n = 20996999 and 20997017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20997059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138063 + ... + 138214.

Almost surely, 2^20997052 is an apocalyptic number.

It is an amenable number.

20997052 is a deficient number, since it is larger than the sum of its proper divisors (17681868).

20997052 is a wasteful number, since it uses less digits than its factorization.

20997052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276300 (or 276298 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 20997052 is about 4582.2540304963. The cubic root of 20997052 is about 275.8795070205.

The spelling of 20997052 in words is "twenty million, nine hundred ninety-seven thousand, fifty-two".