21546051342 has 32 divisors (see below), whose sum is σ = 43336218240. Its totient is φ = 7141428000.

The previous prime is 21546051299. The next prime is 21546051353. The reversal of 21546051342 is 24315064512.

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, 911509 + ... + 934847.

It is an arithmetic number, because the mean of its divisors is an integer number (1354256820).

Almost surely, 2^21546051342 is an apocalyptic number.

21546051342 is an abundant number, since it is smaller than the sum of its proper divisors (21790166898).

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

21546051342 is a wasteful number, since it uses less digits than its factorization.

21546051342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24208.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21546051342 in words is "twenty-one billion, five hundred forty-six million, fifty-one thousand, three hundred forty-two".