21313433042 has 16 divisors (see below), whose sum is σ = 34909812000. Its totient is φ = 9678678240.

The previous prime is 21313433033. The next prime is 21313433077. The reversal of 21313433042 is 24033431312.

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, 438692 + ... + 484847.

It is an arithmetic number, because the mean of its divisors is an integer number (2181863250).

Almost surely, 2^21313433042 is an apocalyptic number.

21313433042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21313433042 is a deficient number, since it is larger than the sum of its proper divisors (13596378958).

21313433042 is a wasteful number, since it uses less digits than its factorization.

21313433042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924601.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21313433042 its reverse (24033431312), we get a palindrome (45346864354).

The spelling of 21313433042 in words is "twenty-one billion, three hundred thirteen million, four hundred thirty-three thousand, forty-two".