20789000 has 32 divisors (see below), whose sum is σ = 48648600. Its totient is φ = 8315200.

The previous prime is 20788997. The next prime is 20789017. The reversal of 20789000 is 98702.

It can be written as a sum of positive squares in 4 ways, for example, as 10510564 + 10278436 = 3242^2 + 3206^2 .

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, 9395 + ... + 11394.

Almost surely, 2^20789000 is an apocalyptic number.

20789000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20789000 is an abundant number, since it is smaller than the sum of its proper divisors (27859600).

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

20789000 is a wasteful number, since it uses less digits than its factorization.

20789000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20810 (or 20796 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20789000 is about 4559.4955861367. The cubic root of 20789000 is about 274.9652848741.

The spelling of 20789000 in words is "twenty million, seven hundred eighty-nine thousand".