21103440050526 has 64 divisors (see below), whose sum is σ = 44388004686336. Its totient is φ = 6675819814400.

The previous prime is 21103440050521. The next prime is 21103440050531. The reversal of 21103440050526 is 62505004430112.

It is an interprime number because it is at equal distance from previous prime (21103440050521) and next prime (21103440050531).

It is a super-2 number, since 2×21103440050526² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103440050521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33930586 + ... + 34546946.

It is an arithmetic number, because the mean of its divisors is an integer number (693562573224).

Almost surely, 2^{21103440050526} is an apocalyptic number.

21103440050526 is an abundant number, since it is smaller than the sum of its proper divisors (23284564635810).

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

21103440050526 is a wasteful number, since it uses less digits than its factorization.

21103440050526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618337.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21103440050526 its reverse (62505004430112), we get a palindrome (83608444480638).

The spelling of 21103440050526 in words is "twenty-one trillion, one hundred three billion, four hundred forty million, fifty thousand, five hundred twenty-six".