20990134 has 8 divisors (see below), whose sum is σ = 34347528. Its totient is φ = 9540960.

The previous prime is 20990111. The next prime is 20990143. The reversal of 20990134 is 43109902.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477027 + ... + 477070.

It is an arithmetic number, because the mean of its divisors is an integer number (4293441).

Almost surely, 2^20990134 is an apocalyptic number.

20990134 is a deficient number, since it is larger than the sum of its proper divisors (13357394).

20990134 is a wasteful number, since it uses less digits than its factorization.

20990134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954110.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 20990134 is about 4581.4990996398. The cubic root of 20990134 is about 275.8492052418.

The spelling of 20990134 in words is "twenty million, nine hundred ninety thousand, one hundred thirty-four".