20745708 has 12 divisors (see below), whose sum is σ = 48406680. Its totient is φ = 6915232.

The previous prime is 20745691. The next prime is 20745761. The reversal of 20745708 is 80754702.

It is a tau number, because it is divible by the number of its divisors (12).

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, 864393 + ... + 864416.

It is an arithmetic number, because the mean of its divisors is an integer number (4033890).

Almost surely, 2^20745708 is an apocalyptic number.

It is an amenable number.

20745708 is an abundant number, since it is smaller than the sum of its proper divisors (27660972).

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

20745708 is a wasteful number, since it uses less digits than its factorization.

20745708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728816 (or 1728814 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 20745708 is about 4554.7456570044. The cubic root of 20745708 is about 274.7742853118.

The spelling of 20745708 in words is "twenty million, seven hundred forty-five thousand, seven hundred eight".