20662456 has 16 divisors (see below), whose sum is σ = 38991240. Its totient is φ = 10264800.

The previous prime is 20662451. The next prime is 20662457. The reversal of 20662456 is 65426602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6970 + ... + 9481.

Almost surely, 2^20662456 is an apocalyptic number.

It is an amenable number.

20662456 is a deficient number, since it is larger than the sum of its proper divisors (18328784).

20662456 is a wasteful number, since it uses less digits than its factorization.

20662456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16614 (or 16610 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20662456 is about 4545.5974304815. The cubic root of 20662456 is about 274.4062384719.

The spelling of 20662456 in words is "twenty million, six hundred sixty-two thousand, four hundred fifty-six".