20898070 has 8 divisors (see below), whose sum is σ = 37616544. Its totient is φ = 8359224.

The previous prime is 20898047. The next prime is 20898091. The reversal of 20898070 is 7089802.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044894 + ... + 1044913.

It is an arithmetic number, because the mean of its divisors is an integer number (4702068).

Almost surely, 2^20898070 is an apocalyptic number.

20898070 is a deficient number, since it is larger than the sum of its proper divisors (16718474).

20898070 is a wasteful number, since it uses less digits than its factorization.

20898070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089814.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 20898070 is about 4571.4406919482. The cubic root of 20898070 is about 275.4453170609.

The spelling of 20898070 in words is "twenty million, eight hundred ninety-eight thousand, seventy".