20908154 has 16 divisors (see below), whose sum is σ = 31993728. Its totient is φ = 10245312.

The previous prime is 20908141. The next prime is 20908157. The reversal of 20908154 is 45180902.

It is not an unprimeable number, because it can be changed into a prime (20908157) by changing a digit.

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, 44927 + ... + 45389.

It is an arithmetic number, because the mean of its divisors is an integer number (1999608).

Almost surely, 2^20908154 is an apocalyptic number.

20908154 is a deficient number, since it is larger than the sum of its proper divisors (11085574).

20908154 is a wasteful number, since it uses less digits than its factorization.

20908154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20908154 is about 4572.5434935056. The cubic root of 20908154 is about 275.4896137182.

The spelling of 20908154 in words is "twenty million, nine hundred eight thousand, one hundred fifty-four".