20922898 has 4 divisors (see below), whose sum is σ = 31384350. Its totient is φ = 10461448.

The previous prime is 20922859. The next prime is 20922901. The reversal of 20922898 is 89822902.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 9653449 = 3357^2 + 3107^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20922898.

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, 5230723 + ... + 5230726.

Almost surely, 2^20922898 is an apocalyptic number.

20922898 is a deficient number, since it is larger than the sum of its proper divisors (10461452).

20922898 is a wasteful number, since it uses less digits than its factorization.

20922898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10461451.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20922898 is about 4574.1554411716. The cubic root of 20922898 is about 275.5543550382.

The spelling of 20922898 in words is "twenty million, nine hundred twenty-two thousand, eight hundred ninety-eight".