21435036746 has 16 divisors (see below), whose sum is σ = 32716752768. Its totient is φ = 10530483600.

The previous prime is 21435036739. The next prime is 21435036839. The reversal of 21435036746 is 64763053412.

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, 215990 + ... + 299201.

It is an arithmetic number, because the mean of its divisors is an integer number (2044797048).

Almost surely, 2^21435036746 is an apocalyptic number.

21435036746 is a deficient number, since it is larger than the sum of its proper divisors (11281716022).

21435036746 is a wasteful number, since it uses less digits than its factorization.

21435036746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515557.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 21435036746 in words is "twenty-one billion, four hundred thirty-five million, thirty-six thousand, seven hundred forty-six".