20988598 has 4 divisors (see below), whose sum is σ = 31482900. Its totient is φ = 10494298.

The previous prime is 20988593. The next prime is 20988599. The reversal of 20988598 is 89588902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5247148 + ... + 5247151.

It is an arithmetic number, because the mean of its divisors is an integer number (7870725).

Almost surely, 2^20988598 is an apocalyptic number.

20988598 is a deficient number, since it is larger than the sum of its proper divisors (10494302).

20988598 is a wasteful number, since it uses less digits than its factorization.

20988598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10494301.

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 20988598 is about 4581.3314658514. The cubic root of 20988598 is about 275.8424764501.

The spelling of 20988598 in words is "twenty million, nine hundred eighty-eight thousand, five hundred ninety-eight".