20980629 has 12 divisors (see below), whose sum is σ = 30606732. Its totient is φ = 13848000.

The previous prime is 20980607. The next prime is 20980637. The reversal of 20980629 is 92608902.

20980629 is a `hidden beast` number, since 20 + 9 + 8 + 0 + 629 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16184529 + 4796100 = 4023^2 + 2190^2 .

It is not a de Polignac number, because 20980629 - 2⁷ = 20980501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20980593 and 20980602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20980639) 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, 10632 + ... + 12449.

It is an arithmetic number, because the mean of its divisors is an integer number (2550561).

Almost surely, 2^20980629 is an apocalyptic number.

It is an amenable number.

20980629 is a deficient number, since it is larger than the sum of its proper divisors (9626103).

20980629 is a wasteful number, since it uses less digits than its factorization.

20980629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23188 (or 23185 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20980629 is about 4580.4616579555. The cubic root of 20980629 is about 275.8075611919.

It can be divided in two parts, 20980 and 629, that added together give a square (21609 = 147²).

The spelling of 20980629 in words is "twenty million, nine hundred eighty thousand, six hundred twenty-nine".