2011621634 has 16 divisors (see below), whose sum is σ = 3292444800. Its totient is φ = 914178960.

The previous prime is 2011621603. The next prime is 2011621639. The reversal of 2011621634 is 4361261102.

It is not an unprimeable number, because it can be changed into a prime (2011621639) by changing a digit.

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, 169127 + ... + 180629.

It is an arithmetic number, because the mean of its divisors is an integer number (205777800).

Almost surely, 2^2011621634 is an apocalyptic number.

2011621634 is a deficient number, since it is larger than the sum of its proper divisors (1280823166).

2011621634 is a wasteful number, since it uses less digits than its factorization.

2011621634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19465.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2011621634 is about 44851.1051591820. The cubic root of 2011621634 is about 1262.3567284270.

Adding to 2011621634 its reverse (4361261102), we get a palindrome (6372882736).

The spelling of 2011621634 in words is "two billion, eleven million, six hundred twenty-one thousand, six hundred thirty-four".