20869030 has 128 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 5806080.

The previous prime is 20869003. The next prime is 20869091. The reversal of 20869030 is 3096802.

20869030 is a nontrivial binomial coefficient, being equal to C(6461, 2).

It is a self number, because there is not a number n which added to its sum of digits gives 20869030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 293895 + ... + 293965.

It is an arithmetic number, because the mean of its divisors is an integer number (408240).

Almost surely, 2^20869030 is an apocalyptic number.

20869030 is the 6460-th triangular number.

20869030 is the 2154-th centered nonagonal number.

20869030 is an abundant number, since it is smaller than the sum of its proper divisors (31385690).

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

20869030 is a wasteful number, since it uses less digits than its factorization.

20869030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20869030 is about 4568.2633461743. The cubic root of 20869030 is about 275.3176714620.

The spelling of 20869030 in words is "twenty million, eight hundred sixty-nine thousand, thirty".