20751102 has 24 divisors (see below), whose sum is σ = 45700200. Its totient is φ = 6803280.

The previous prime is 20751089. The next prime is 20751103. The reversal of 20751102 is 20115702.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8352 + ... + 10547.

It is an arithmetic number, because the mean of its divisors is an integer number (1904175).

Almost surely, 2^20751102 is an apocalyptic number.

20751102 is an abundant number, since it is smaller than the sum of its proper divisors (24949098).

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

20751102 is a wasteful number, since it uses less digits than its factorization.

20751102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18968 (or 18965 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 20751102 is about 4555.3377481807. The cubic root of 20751102 is about 274.7980975314.

Adding to 20751102 its reverse (20115702), we get a palindrome (40866804).

The spelling of 20751102 in words is "twenty million, seven hundred fifty-one thousand, one hundred two".