21441325503542 has 16 divisors (see below), whose sum is σ = 36765717473952. Its totient is φ = 9186849634560.

The previous prime is 21441325503539. The next prime is 21441325503551. The reversal of 21441325503542 is 24530552314412.

It is a self number, because there is not a number n which added to its sum of digits gives 21441325503542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190764059 + ... + 190876422.

It is an arithmetic number, because the mean of its divisors is an integer number (2297857342122).

Almost surely, 2^{21441325503542} is an apocalyptic number.

21441325503542 is a deficient number, since it is larger than the sum of its proper divisors (15324391970410).

21441325503542 is a wasteful number, since it uses less digits than its factorization.

21441325503542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381644503.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 21441325503542 its reverse (24530552314412), we get a palindrome (45971877817954).

The spelling of 21441325503542 in words is "twenty-one trillion, four hundred forty-one billion, three hundred twenty-five million, five hundred three thousand, five hundred forty-two".