20630547 has 12 divisors (see below), whose sum is σ = 34056880. Its totient is φ = 11788848.

The previous prime is 20630543. The next prime is 20630551. The reversal of 20630547 is 74503602.

It is a happy number.

20630547 is a `hidden beast` number, since 20 + 630 + 5 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (20630543) and next prime (20630551).

It is not a de Polignac number, because 20630547 - 2² = 20630543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20630547.

It is not an unprimeable number, because it can be changed into a prime (20630543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163672 + ... + 163797.

Almost surely, 2^20630547 is an apocalyptic number.

20630547 is a deficient number, since it is larger than the sum of its proper divisors (13426333).

20630547 is a wasteful number, since it uses less digits than its factorization.

20630547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327482 (or 327479 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20630547 is about 4542.0861946907. The cubic root of 20630547 is about 274.2649106478.

The spelling of 20630547 in words is "twenty million, six hundred thirty thousand, five hundred forty-seven".