20889698 has 4 divisors (see below), whose sum is σ = 31334550. Its totient is φ = 10444848.

The previous prime is 20889679. The next prime is 20889703. The reversal of 20889698 is 89698802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89698802 = 2 ⋅44849401.

It can be written as a sum of positive squares in only one way, i.e., 13010449 + 7879249 = 3607^2 + 2807^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5222423 + ... + 5222426.

Almost surely, 2^20889698 is an apocalyptic number.

20889698 is a deficient number, since it is larger than the sum of its proper divisors (10444852).

20889698 is a wasteful number, since it uses less digits than its factorization.

20889698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10444851.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 20889698 is about 4570.5249151492. The cubic root of 20889698 is about 275.4085299923.

The spelling of 20889698 in words is "twenty million, eight hundred eighty-nine thousand, six hundred ninety-eight".