21143013342 has 32 divisors (see below), whose sum is σ = 46136300544. Its totient is φ = 6406128000.

The previous prime is 21143013329. The next prime is 21143013427. The reversal of 21143013342 is 24331034112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636342 + ... + 668742.

It is an arithmetic number, because the mean of its divisors is an integer number (1441759392).

Almost surely, 2^21143013342 is an apocalyptic number.

21143013342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21143013342 is an abundant number, since it is smaller than the sum of its proper divisors (24993287202).

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

21143013342 is a wasteful number, since it uses less digits than its factorization.

21143013342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42304.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21143013342 its reverse (24331034112), we get a palindrome (45474047454).

The spelling of 21143013342 in words is "twenty-one billion, one hundred forty-three million, thirteen thousand, three hundred forty-two".