20609708 has 12 divisors (see below), whose sum is σ = 41219472. Its totient is φ = 8832720.

The previous prime is 20609707. The next prime is 20609711. The reversal of 20609708 is 80790602.

20609708 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20609707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368003 + ... + 368058.

It is an arithmetic number, because the mean of its divisors is an integer number (3434956).

Almost surely, 2^20609708 is an apocalyptic number.

20609708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20609708 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20609708 is a wasteful number, since it uses less digits than its factorization.

20609708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736072 (or 736070 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20609708 is about 4539.7916251740. The cubic root of 20609708 is about 274.1725341678.

The spelling of 20609708 in words is "twenty million, six hundred nine thousand, seven hundred eight".