21434071600 has 30 divisors (see below), whose sum is σ = 51495357980. Its totient is φ = 8573628480.

The previous prime is 21434071531. The next prime is 21434071601. The reversal of 21434071600 is 617043412.

It is not an unprimeable number, because it can be changed into a prime (21434071601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26792190 + ... + 26792989.

Almost surely, 2^21434071600 is an apocalyptic number.

21434071600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21434071600 is an abundant number, since it is smaller than the sum of its proper divisors (30061286380).

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

21434071600 is a wasteful number, since it uses less digits than its factorization.

21434071600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53585197 (or 53585186 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 21434071600 in words is "twenty-one billion, four hundred thirty-four million, seventy-one thousand, six hundred".