20898512 has 10 divisors (see below), whose sum is σ = 40490898. Its totient is φ = 10449248.

The previous prime is 20898481. The next prime is 20898529. The reversal of 20898512 is 21589802.

It can be written as a sum of positive squares in only one way, i.e., 20757136 + 141376 = 4556^2 + 376^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653063 + ... + 653094.

Almost surely, 2^20898512 is an apocalyptic number.

It is an amenable number.

20898512 is a deficient number, since it is larger than the sum of its proper divisors (19592386).

20898512 is a wasteful number, since it uses less digits than its factorization.

20898512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306165 (or 1306159 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 20898512 is about 4571.4890353144. The cubic root of 20898512 is about 275.4472589622.

It can be divided in two parts, 2089 and 8512, that added together give a palindrome (10601).

The spelling of 20898512 in words is "twenty million, eight hundred ninety-eight thousand, five hundred twelve".