20898668 has 24 divisors (see below), whose sum is σ = 41997312. Its totient is φ = 8913744.

The previous prime is 20898667. The next prime is 20898677. The reversal of 20898668 is 86689802.

It is not an unprimeable number, because it can be changed into a prime (20898667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4571 + ... + 7917.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^20898668 is an apocalyptic number.

20898668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20898668 is an abundant number, since it is smaller than the sum of its proper divisors (21098644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20898668 is a wasteful number, since it uses less digits than its factorization.

20898668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 20898668 is about 4571.5060975569. The cubic root of 20898668 is about 275.4479443326.

The spelling of 20898668 in words is "twenty million, eight hundred ninety-eight thousand, six hundred sixty-eight".