20657368 has 8 divisors (see below), whose sum is σ = 38732580. Its totient is φ = 10328680.

The previous prime is 20657347. The next prime is 20657383. The reversal of 20657368 is 86375602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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, 1291078 + ... + 1291093.

Almost surely, 2^20657368 is an apocalyptic number.

It is an amenable number.

20657368 is a deficient number, since it is larger than the sum of its proper divisors (18075212).

20657368 is a wasteful number, since it uses less digits than its factorization.

20657368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582177 (or 2582173 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20657368 is about 4545.0377336167. The cubic root of 20657368 is about 274.3837130187.

It can be divided in two parts, 20657 and 368, that added together give a square (21025 = 145²).

The spelling of 20657368 in words is "twenty million, six hundred fifty-seven thousand, three hundred sixty-eight".