21542414355 has 192 divisors, whose sum is σ = 48267767808. Its totient is φ = 8627834880.

The previous prime is 21542414347. The next prime is 21542414357. The reversal of 21542414355 is 55341424512.

21542414355 is a `hidden beast` number, since 21 + 542 + 4 + 1 + 43 + 55 = 666.

It is not a de Polignac number, because 21542414355 - 2³ = 21542414347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21542414357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14486422 + ... + 14487908.

It is an arithmetic number, because the mean of its divisors is an integer number (251394624).

Almost surely, 2^21542414355 is an apocalyptic number.

21542414355 is an abundant number, since it is smaller than the sum of its proper divisors (26725353453).

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

21542414355 is a wasteful number, since it uses less digits than its factorization.

21542414355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1663 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 21542414355 its reverse (55341424512), we get a palindrome (76883838867).

The spelling of 21542414355 in words is "twenty-one billion, five hundred forty-two million, four hundred fourteen thousand, three hundred fifty-five".