20748786 has 16 divisors (see below), whose sum is σ = 42619584. Its totient is φ = 6729264.

The previous prime is 20748773. The next prime is 20748803. The reversal of 20748786 is 68784702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46510 + ... + 46953.

It is an arithmetic number, because the mean of its divisors is an integer number (2663724).

Almost surely, 2^20748786 is an apocalyptic number.

20748786 is an abundant number, since it is smaller than the sum of its proper divisors (21870798).

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

20748786 is a wasteful number, since it uses less digits than its factorization.

20748786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93505.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 20748786 is about 4555.0835338114. The cubic root of 20748786 is about 274.7878738804.

The spelling of 20748786 in words is "twenty million, seven hundred forty-eight thousand, seven hundred eighty-six".