20061998 has 16 divisors (see below), whose sum is σ = 32925744. Its totient is φ = 9092160.

The previous prime is 20061983. The next prime is 20062019. The reversal of 20061998 is 89916002.

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 7 ways as a sum of consecutive naturals, for example, 7586 + ... + 9882.

It is an arithmetic number, because the mean of its divisors is an integer number (2057859).

Almost surely, 2^20061998 is an apocalyptic number.

20061998 is a deficient number, since it is larger than the sum of its proper divisors (12863746).

20061998 is a wasteful number, since it uses less digits than its factorization.

20061998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 20061998 is about 4479.0621786262. The cubic root of 20061998 is about 271.7219531091.

It can be divided in two parts, 2006 and 1998, that added together give a palindrome (4004).

The spelling of 20061998 in words is "twenty million, sixty-one thousand, nine hundred ninety-eight".