20054990 has 8 divisors (see below), whose sum is σ = 36099000. Its totient is φ = 8021992.

The previous prime is 20054977. The next prime is 20055001. The reversal of 20054990 is 9945002.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002740 + ... + 1002759.

It is an arithmetic number, because the mean of its divisors is an integer number (4512375).

Almost surely, 2^20054990 is an apocalyptic number.

20054990 is a deficient number, since it is larger than the sum of its proper divisors (16044010).

20054990 is a wasteful number, since it uses less digits than its factorization.

20054990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005506.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20054990 is about 4478.2798036746. The cubic root of 20054990 is about 271.6903103781.

Adding to 20054990 its reverse (9945002), we get a palindrome (29999992).

The spelling of 20054990 in words is "twenty million, fifty-four thousand, nine hundred ninety".