20157102 has 24 divisors (see below), whose sum is σ = 49913136. Its totient is φ = 5759136.

The previous prime is 20157097. The next prime is 20157107. The reversal of 20157102 is 20175102.

It is an interprime number because it is at equal distance from previous prime (20157097) and next prime (20157107).

It is a super-2 number, since 2×20157102² = 812617522076808, which contains 22 as substring.

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 (20157107) 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 11 ways as a sum of consecutive naturals, for example, 79863 + ... + 80114.

It is an arithmetic number, because the mean of its divisors is an integer number (2079714).

Almost surely, 2^20157102 is an apocalyptic number.

20157102 is an abundant number, since it is smaller than the sum of its proper divisors (29756034).

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

20157102 is a wasteful number, since it uses less digits than its factorization.

20157102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159992 (or 159989 counting only the distinct ones).

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

The square root of 20157102 is about 4489.6661345806. Note that the first 3 decimals coincide. The cubic root of 20157102 is about 272.1506428366.

The spelling of 20157102 in words is "twenty million, one hundred fifty-seven thousand, one hundred two".