20854788 has 12 divisors (see below), whose sum is σ = 48661200. Its totient is φ = 6951592.

The previous prime is 20854739. The next prime is 20854843. The reversal of 20854788 is 88745802.

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, 868938 + ... + 868961.

It is an arithmetic number, because the mean of its divisors is an integer number (4055100).

Almost surely, 2^20854788 is an apocalyptic number.

It is an amenable number.

20854788 is an abundant number, since it is smaller than the sum of its proper divisors (27806412).

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

20854788 is a wasteful number, since it uses less digits than its factorization.

20854788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737906 (or 1737904 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 20854788 is about 4566.7042820835. The cubic root of 20854788 is about 275.2550273335.

The spelling of 20854788 in words is "twenty million, eight hundred fifty-four thousand, seven hundred eighty-eight".