21200608434 has 16 divisors (see below), whose sum is σ = 42435180000. Its totient is φ = 7061208960.

The previous prime is 21200608433. The next prime is 21200608463. The reversal of 21200608434 is 43480600212.

It is not an unprimeable number, because it can be changed into a prime (21200608433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1407012 + ... + 1421999.

It is an arithmetic number, because the mean of its divisors is an integer number (2652198750).

Almost surely, 2^21200608434 is an apocalyptic number.

21200608434 is an abundant number, since it is smaller than the sum of its proper divisors (21234571566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200608434 is a wasteful number, since it uses less digits than its factorization.

21200608434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830265.

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 21200608434 in words is "twenty-one billion, two hundred million, six hundred eight thousand, four hundred thirty-four".