21542450354 has 16 divisors (see below), whose sum is σ = 34266434400. Its totient is φ = 10122229824.

The previous prime is 21542450351. The next prime is 21542450387. The reversal of 21542450354 is 45305424512.

It is not an unprimeable number, because it can be changed into a prime (21542450351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458324 + ... + 503135.

It is an arithmetic number, because the mean of its divisors is an integer number (2141652150).

Almost surely, 2^21542450354 is an apocalyptic number.

21542450354 is a deficient number, since it is larger than the sum of its proper divisors (12723984046).

21542450354 is a wasteful number, since it uses less digits than its factorization.

21542450354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962137.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 21542450354 its reverse (45305424512), we get a palindrome (66847874866).

The spelling of 21542450354 in words is "twenty-one billion, five hundred forty-two million, four hundred fifty thousand, three hundred fifty-four".