21032413042 has 4 divisors (see below), whose sum is σ = 31548619566. Its totient is φ = 10516206520.

The previous prime is 21032413007. The next prime is 21032413069. The reversal of 21032413042 is 24031423012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10803315721 + 10229097321 = 103939^2 + 101139^2 .

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 as a sum of consecutive naturals, namely, 5258103259 + ... + 5258103262.

Almost surely, 2^21032413042 is an apocalyptic number.

21032413042 is a deficient number, since it is larger than the sum of its proper divisors (10516206524).

21032413042 is a wasteful number, since it uses less digits than its factorization.

21032413042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516206523.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21032413042 its reverse (24031423012), we get a palindrome (45063836054).

The spelling of 21032413042 in words is "twenty-one billion, thirty-two million, four hundred thirteen thousand, forty-two".