20998352 has 10 divisors (see below), whose sum is σ = 40684338. Its totient is φ = 10499168.

The previous prime is 20998303. The next prime is 20998387. The reversal of 20998352 is 25389902.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 712336 = 4504^2 + 844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656183 + ... + 656214.

Almost surely, 2^20998352 is an apocalyptic number.

It is an amenable number.

20998352 is a deficient number, since it is larger than the sum of its proper divisors (19685986).

20998352 is a wasteful number, since it uses less digits than its factorization.

20998352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312405 (or 1312399 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 20998352 is about 4582.3958798864. The cubic root of 20998352 is about 275.8852004540.

The spelling of 20998352 in words is "twenty million, nine hundred ninety-eight thousand, three hundred fifty-two".