2021812734 has 16 divisors (see below), whose sum is σ = 4045865472. Its totient is φ = 673564248.

The previous prime is 2021812729. The next prime is 2021812799. The reversal of 2021812734 is 4372181202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81484 + ... + 103359.

It is an arithmetic number, because the mean of its divisors is an integer number (252866592).

Almost surely, 2^2021812734 is an apocalyptic number.

2021812734 is an abundant number, since it is smaller than the sum of its proper divisors (2024052738).

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

2021812734 is a wasteful number, since it uses less digits than its factorization.

2021812734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186671.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 2021812734 is about 44964.5719872879. The cubic root of 2021812734 is about 1264.4848853879.

Adding to 2021812734 its reverse (4372181202), we get a palindrome (6393993936).

The spelling of 2021812734 in words is "two billion, twenty-one million, eight hundred twelve thousand, seven hundred thirty-four".