20804998 has 8 divisors (see below), whose sum is σ = 31324320. Its totient is φ = 10363560.

The previous prime is 20804983. The next prime is 20805011. The reversal of 20804998 is 89940802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20804998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18798 + ... + 19873.

It is an arithmetic number, because the mean of its divisors is an integer number (3915540).

Almost surely, 2^20804998 is an apocalyptic number.

20804998 is a deficient number, since it is larger than the sum of its proper divisors (10519322).

20804998 is a wasteful number, since it uses less digits than its factorization.

20804998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38942.

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

The square root of 20804998 is about 4561.2496094820. The cubic root of 20804998 is about 275.0357991962.

The spelling of 20804998 in words is "twenty million, eight hundred four thousand, nine hundred ninety-eight".