20429708 has 12 divisors (see below), whose sum is σ = 38502240. Its totient is φ = 9429072.

The previous prime is 20429663. The next prime is 20429711. The reversal of 20429708 is 80792402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196388 + ... + 196491.

It is an arithmetic number, because the mean of its divisors is an integer number (3208520).

Almost surely, 2^20429708 is an apocalyptic number.

It is an amenable number.

20429708 is a deficient number, since it is larger than the sum of its proper divisors (18072532).

20429708 is a wasteful number, since it uses less digits than its factorization.

20429708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392896 (or 392894 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20429708 is about 4519.9234506792. The cubic root of 20429708 is about 273.3720144874.

The spelling of 20429708 in words is "twenty million, four hundred twenty-nine thousand, seven hundred eight".