2101157734 has 24 divisors (see below), whose sum is σ = 3424113000. Its totient is φ = 966558528.

The previous prime is 2101157717. The next prime is 2101157783. The reversal of 2101157734 is 4377511012.

It is a junction number, because it is equal to n+sod(n) for n = 2101157696 and 2101157705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93642 + ... + 113890.

It is an arithmetic number, because the mean of its divisors is an integer number (142671375).

Almost surely, 2^2101157734 is an apocalyptic number.

2101157734 is a deficient number, since it is larger than the sum of its proper divisors (1322955266).

2101157734 is a wasteful number, since it uses less digits than its factorization.

2101157734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20584 (or 20571 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 2101157734 is about 45838.3871225854. The cubic root of 2101157734 is about 1280.8144503327.

Adding to 2101157734 its reverse (4377511012), we get a palindrome (6478668746).

The spelling of 2101157734 in words is "two billion, one hundred one million, one hundred fifty-seven thousand, seven hundred thirty-four".