20680029 has 12 divisors (see below), whose sum is σ = 30977856. Its totient is φ = 13786524.

The previous prime is 20680027. The next prime is 20680039. The reversal of 20680029 is 92008602.

It is not a de Polignac number, because 20680029 - 2¹ = 20680027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20679984 and 20680011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680021) 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, 42309 + ... + 42794.

It is an arithmetic number, because the mean of its divisors is an integer number (2581488).

Almost surely, 2^20680029 is an apocalyptic number.

It is an amenable number.

20680029 is a deficient number, since it is larger than the sum of its proper divisors (10297827).

20680029 is an frugal number, since it uses more digits than its factorization.

20680029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85118 (or 85106 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20680029 is about 4547.5299889061. The cubic root of 20680029 is about 274.4840087433.

The spelling of 20680029 in words is "twenty million, six hundred eighty thousand, twenty-nine".