21442100540052 has 24 divisors (see below), whose sum is σ = 50032545796800. Its totient is φ = 7147227150976.

The previous prime is 21442100540051. The next prime is 21442100540053. The reversal of 21442100540052 is 25004500124412.

It is an interprime number because it is at equal distance from previous prime (21442100540051) and next prime (21442100540053).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442100540051) 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, 16821477 + ... + 18051212.

It is an arithmetic number, because the mean of its divisors is an integer number (2084689408200).

Almost surely, 2^{21442100540052} is an apocalyptic number.

It is an amenable number.

21442100540052 is an abundant number, since it is smaller than the sum of its proper divisors (28590445256748).

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

21442100540052 is a wasteful number, since it uses less digits than its factorization.

21442100540052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34923935 (or 34923933 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 21442100540052 its reverse (25004500124412), we get a palindrome (46446600664464).

The spelling of 21442100540052 in words is "twenty-one trillion, four hundred forty-two billion, one hundred million, five hundred forty thousand, fifty-two".