21036032546 has 16 divisors (see below), whose sum is σ = 31618841184. Its totient is φ = 10496438304.

The previous prime is 21036032539. The next prime is 21036032581. The reversal of 21036032546 is 64523063012.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3093326 + ... + 3100118.

It is an arithmetic number, because the mean of its divisors is an integer number (1976177574).

Almost surely, 2^21036032546 is an apocalyptic number.

21036032546 is a deficient number, since it is larger than the sum of its proper divisors (10582808638).

21036032546 is a wasteful number, since it uses less digits than its factorization.

21036032546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9745.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21036032546 its reverse (64523063012), we get a palindrome (85559095558).

The spelling of 21036032546 in words is "twenty-one billion, thirty-six million, thirty-two thousand, five hundred forty-six".