2100340042 has 16 divisors (see below), whose sum is σ = 3222829440. Its totient is φ = 1026137088.

The previous prime is 2100340007. The next prime is 2100340043. The reversal of 2100340042 is 2400430012.

It is a super-2 number, since 2×2100340042² = 8822856584057123528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100339998 and 2100340025.

It is not an unprimeable number, because it can be changed into a prime (2100340043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40138 + ... + 76234.

It is an arithmetic number, because the mean of its divisors is an integer number (201426840).

Almost surely, 2^2100340042 is an apocalyptic number.

2100340042 is a deficient number, since it is larger than the sum of its proper divisors (1122489398).

2100340042 is a wasteful number, since it uses less digits than its factorization.

2100340042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36765.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2100340042 is about 45829.4669617703. The cubic root of 2100340042 is about 1280.6482804159.

Adding to 2100340042 its reverse (2400430012), we get a palindrome (4500770054).

The spelling of 2100340042 in words is "two billion, one hundred million, three hundred forty thousand, forty-two".