20701628 has 6 divisors (see below), whose sum is σ = 36227856. Its totient is φ = 10350812.

The previous prime is 20701627. The next prime is 20701649. The reversal of 20701628 is 82610702.

It is a junction number, because it is equal to n+sod(n) for n = 20701597 and 20701606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2587700 + ... + 2587707.

It is an arithmetic number, because the mean of its divisors is an integer number (6037976).

Almost surely, 2^20701628 is an apocalyptic number.

It is an amenable number.

20701628 is a deficient number, since it is larger than the sum of its proper divisors (15526228).

20701628 is a wasteful number, since it uses less digits than its factorization.

20701628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175411 (or 5175409 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20701628 is about 4549.9041748151. The cubic root of 20701628 is about 274.5795359673.

The spelling of 20701628 in words is "twenty million, seven hundred one thousand, six hundred twenty-eight".