20068929 has 12 divisors (see below), whose sum is σ = 29038932. Its totient is φ = 13356000.

The previous prime is 20068907. The next prime is 20068933. The reversal of 20068929 is 92986002.

It can be written as a sum of positive squares in 2 ways, for example, as 9000000 + 11068929 = 3000^2 + 3327^2 .

It is not a de Polignac number, because 20068929 - 2¹¹ = 20066881 is a prime.

It is a super-2 number, since 2×20068929² = 805523822414082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20068893 and 20068902.

It is not an unprimeable number, because it can be changed into a prime (20068969) 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, 4719 + ... + 7899.

It is an arithmetic number, because the mean of its divisors is an integer number (2419911).

Almost surely, 2^20068929 is an apocalyptic number.

It is an amenable number.

20068929 is a deficient number, since it is larger than the sum of its proper divisors (8970003).

20068929 is a wasteful number, since it uses less digits than its factorization.

20068929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888 (or 3885 counting only the distinct ones).

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

The square root of 20068929 is about 4479.8358228846. The cubic root of 20068929 is about 271.7532409203.

The spelling of 20068929 in words is "twenty million, sixty-eight thousand, nine hundred twenty-nine".