21701331406 has 32 divisors (see below), whose sum is σ = 33600547008. Its totient is φ = 10505429760.

The previous prime is 21701331389. The next prime is 21701331409. The reversal of 21701331406 is 60413310712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21701331409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10397295 + ... + 10399381.

It is an arithmetic number, because the mean of its divisors is an integer number (1050017094).

Almost surely, 2^21701331406 is an apocalyptic number.

21701331406 is a deficient number, since it is larger than the sum of its proper divisors (11899215602).

21701331406 is a wasteful number, since it uses less digits than its factorization.

21701331406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 3024, while the sum is 28.

The spelling of 21701331406 in words is "twenty-one billion, seven hundred one million, three hundred thirty-one thousand, four hundred six".