20182990 has 8 divisors (see below), whose sum is σ = 36329400. Its totient is φ = 8073192.

The previous prime is 20182979. The next prime is 20182993. The reversal of 20182990 is 9928102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20182993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009140 + ... + 1009159.

It is an arithmetic number, because the mean of its divisors is an integer number (4541175).

Almost surely, 2^20182990 is an apocalyptic number.

20182990 is a deficient number, since it is larger than the sum of its proper divisors (16146410).

20182990 is a wasteful number, since it uses less digits than its factorization.

20182990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018306.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20182990 is about 4492.5482746432. The cubic root of 20182990 is about 272.2671017372.

The spelling of 20182990 in words is "twenty million, one hundred eighty-two thousand, nine hundred ninety".