21533241312040 has 64 divisors (see below), whose sum is σ = 49766482944000. Its totient is φ = 8379286011648.

The previous prime is 21533241312029. The next prime is 21533241312053. The reversal of 21533241312040 is 4021314233512.

It is a super-2 number, since 2×21533241312040² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21533241311993 and 21533241312011.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9156057 + ... + 11264983.

It is an arithmetic number, because the mean of its divisors is an integer number (777601296000).

Almost surely, 2^{21533241312040} is an apocalyptic number.

21533241312040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21533241312040 is an abundant number, since it is smaller than the sum of its proper divisors (28233241631960).

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

21533241312040 is a wasteful number, since it uses less digits than its factorization.

21533241312040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115874 (or 2115870 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 21533241312040 its reverse (4021314233512), we get a palindrome (25554555545552).

The spelling of 21533241312040 in words is "twenty-one trillion, five hundred thirty-three billion, two hundred forty-one million, three hundred twelve thousand, forty".