21542088754220 has 24 divisors (see below), whose sum is σ = 45246266504208. Its totient is φ = 8615334526400.

The previous prime is 21542088754211. The next prime is 21542088754229. The reversal of 21542088754220 is 2245788024512.

It is an interprime number because it is at equal distance from previous prime (21542088754211) and next prime (21542088754229).

It is not an unprimeable number, because it can be changed into a prime (21542088754229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93693266 + ... + 93922905.

It is an arithmetic number, because the mean of its divisors is an integer number (1885261104342).

Almost surely, 2^{21542088754220} is an apocalyptic number.

21542088754220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21542088754220 is an abundant number, since it is smaller than the sum of its proper divisors (23704177749988).

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

21542088754220 is a wasteful number, since it uses less digits than its factorization.

21542088754220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187621921 (or 187621919 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 50.

The spelling of 21542088754220 in words is "twenty-one trillion, five hundred forty-two billion, eighty-eight million, seven hundred fifty-four thousand, two hundred twenty".