20715102 has 40 divisors (see below), whose sum is σ = 47097072. Its totient is φ = 6804000.

The previous prime is 20715091. The next prime is 20715113. The reversal of 20715102 is 20151702.

It is an interprime number because it is at equal distance from previous prime (20715091) and next prime (20715113).

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

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 19 ways as a sum of consecutive naturals, for example, 10602 + ... + 12402.

Almost surely, 2^20715102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20715102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23548536).

20715102 is an abundant number, since it is smaller than the sum of its proper divisors (26381970).

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

20715102 is a wasteful number, since it uses less digits than its factorization.

20715102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886 (or 1877 counting only the distinct ones).

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

The square root of 20715102 is about 4551.3846244852. The cubic root of 20715102 is about 274.6390946051.

Adding to 20715102 its reverse (20151702), we get a palindrome (40866804).

The spelling of 20715102 in words is "twenty million, seven hundred fifteen thousand, one hundred two".