21342140550 has 96 divisors (see below), whose sum is σ = 60177279360. Its totient is φ = 5558868000.

The previous prime is 21342140539. The next prime is 21342140551. The reversal of 21342140550 is 5504124312.

21342140550 is a `hidden beast` number, since 21 + 34 + 21 + 40 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342140551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125776 + ... + 241875.

It is an arithmetic number, because the mean of its divisors is an integer number (626846660).

Almost surely, 2^21342140550 is an apocalyptic number.

21342140550 is an abundant number, since it is smaller than the sum of its proper divisors (38835138810).

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

21342140550 is a wasteful number, since it uses less digits than its factorization.

21342140550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367715 (or 367704 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21342140550 its reverse (5504124312), we get a palindrome (26846264862).

The spelling of 21342140550 in words is "twenty-one billion, three hundred forty-two million, one hundred forty thousand, five hundred fifty".