21435142000 has 40 divisors (see below), whose sum is σ = 51830178192. Its totient is φ = 8574056000.

The previous prime is 21435141991. The next prime is 21435142007. The reversal of 21435142000 is 24153412.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435142007) 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 7 ways as a sum of consecutive naturals, for example, 5356786 + ... + 5360785.

Almost surely, 2^21435142000 is an apocalyptic number.

21435142000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21435142000 is an abundant number, since it is smaller than the sum of its proper divisors (30395036192).

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

21435142000 is a wasteful number, since it uses less digits than its factorization.

21435142000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10717594 (or 10717578 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21435142000 its reverse (24153412), we get a palindrome (21459295412).

The spelling of 21435142000 in words is "twenty-one billion, four hundred thirty-five million, one hundred forty-two thousand".