21014454342 has 32 divisors (see below), whose sum is σ = 48399715584. Its totient is φ = 5958295200.

The previous prime is 21014454287. The next prime is 21014454371. The reversal of 21014454342 is 24345441012.

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, 1904209 + ... + 1915212.

It is an arithmetic number, because the mean of its divisors is an integer number (1512491112).

Almost surely, 2^21014454342 is an apocalyptic number.

21014454342 is an abundant number, since it is smaller than the sum of its proper divisors (27385261242).

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

21014454342 is a wasteful number, since it uses less digits than its factorization.

21014454342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819564.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21014454342 its reverse (24345441012), we get a palindrome (45359895354).

The spelling of 21014454342 in words is "twenty-one billion, fourteen million, four hundred fifty-four thousand, three hundred forty-two".