20677630 has 16 divisors (see below), whose sum is σ = 37271520. Its totient is φ = 8259552.

The previous prime is 20677619. The next prime is 20677639. The reversal of 20677630 is 3677602.

It is a junction number, because it is equal to n+sod(n) for n = 20677592 and 20677601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13567 + ... + 15013.

It is an arithmetic number, because the mean of its divisors is an integer number (2329470).

Almost surely, 2^20677630 is an apocalyptic number.

20677630 is a deficient number, since it is larger than the sum of its proper divisors (16593890).

20677630 is a wasteful number, since it uses less digits than its factorization.

20677630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 20677630 is about 4547.2662116925. The cubic root of 20677630 is about 274.4733944351.

The spelling of 20677630 in words is "twenty million, six hundred seventy-seven thousand, six hundred thirty".