20980490 has 16 divisors (see below), whose sum is σ = 38983680. Its totient is φ = 8121360.

The previous prime is 20980483. The next prime is 20980501. The reversal of 20980490 is 9408902.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33530 + ... + 34149.

It is an arithmetic number, because the mean of its divisors is an integer number (2436480).

Almost surely, 2^20980490 is an apocalyptic number.

20980490 is a deficient number, since it is larger than the sum of its proper divisors (18003190).

20980490 is a wasteful number, since it uses less digits than its factorization.

20980490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67717.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20980490 is about 4580.4464847873. The cubic root of 20980490 is about 275.8069521009.

The spelling of 20980490 in words is "twenty million, nine hundred eighty thousand, four hundred ninety".