20807704 has 8 divisors (see below), whose sum is σ = 39014460. Its totient is φ = 10403848.

The previous prime is 20807693. The next prime is 20807713. The reversal of 20807704 is 40770802.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300474 + ... + 1300489.

Almost surely, 2^20807704 is an apocalyptic number.

It is an amenable number.

20807704 is a deficient number, since it is larger than the sum of its proper divisors (18206756).

20807704 is a wasteful number, since it uses less digits than its factorization.

20807704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600969 (or 2600965 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 20807704 is about 4561.5462290763. The cubic root of 20807704 is about 275.0477228473.

The spelling of 20807704 in words is "twenty million, eight hundred seven thousand, seven hundred four".