2102157036 has 432 divisors, whose sum is σ = 7110754560. Its totient is φ = 538876800.

The previous prime is 2102157023. The next prime is 2102157037. The reversal of 2102157036 is 6307512012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2102157037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 20813386 + ... + 20813486.

It is an arithmetic number, because the mean of its divisors is an integer number (16460080).

Almost surely, 2^2102157036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102157036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3555377280).

2102157036 is an abundant number, since it is smaller than the sum of its proper divisors (5008597524).

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

2102157036 is a wasteful number, since it uses less digits than its factorization.

2102157036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2102157036 is about 45849.2861013124. The cubic root of 2102157036 is about 1281.0174681843.

Adding to 2102157036 its reverse (6307512012), we get a palindrome (8409669048).

The spelling of 2102157036 in words is "two billion, one hundred two million, one hundred fifty-seven thousand, thirty-six".