21434712192 has 96 divisors (see below), whose sum is σ = 61782318000. Its totient is φ = 7133124096.

The previous prime is 21434712149. The next prime is 21434712227. The reversal of 21434712192 is 29121743412.

21434712192 is a `hidden beast` number, since 2 + 1 + 434 + 7 + 1 + 219 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698059 + ... + 728117.

Almost surely, 2^21434712192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21434712192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30891159000).

21434712192 is an abundant number, since it is smaller than the sum of its proper divisors (40347605808).

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

21434712192 is a wasteful number, since it uses less digits than its factorization.

21434712192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30698 (or 30683 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The spelling of 21434712192 in words is "twenty-one billion, four hundred thirty-four million, seven hundred twelve thousand, one hundred ninety-two".