20851068 has 36 divisors (see below), whose sum is σ = 56597352. Its totient is φ = 5957280.

The previous prime is 20851007. The next prime is 20851097. The reversal of 20851068 is 86015802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17143 + ... + 18318.

Almost surely, 2^20851068 is an apocalyptic number.

20851068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20851068 is an abundant number, since it is smaller than the sum of its proper divisors (35746284).

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

20851068 is a wasteful number, since it uses less digits than its factorization.

20851068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35482 (or 35473 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 20851068 is about 4566.2969680037. The cubic root of 20851068 is about 275.2386600355.

The spelling of 20851068 in words is "twenty million, eight hundred fifty-one thousand, sixty-eight".