20988102 has 16 divisors (see below), whose sum is σ = 43111152. Its totient is φ = 6806880.

The previous prime is 20988101. The next prime is 20988109. The reversal of 20988102 is 20188902.

It is a self number, because there is not a number n which added to its sum of digits gives 20988102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988101) by changing a digit.

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, 47049 + ... + 47492.

It is an arithmetic number, because the mean of its divisors is an integer number (2694447).

Almost surely, 2^20988102 is an apocalyptic number.

20988102 is an abundant number, since it is smaller than the sum of its proper divisors (22123050).

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

20988102 is a wasteful number, since it uses less digits than its factorization.

20988102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94583.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 20988102 is about 4581.2773327970. The cubic root of 20988102 is about 275.8403035410.

The spelling of 20988102 in words is "twenty million, nine hundred eighty-eight thousand, one hundred two".