21335050203540 has 48 divisors (see below), whose sum is σ = 59738348613888. Its totient is φ = 5689326907264.

The previous prime is 21335050203497. The next prime is 21335050203547. The reversal of 21335050203540 is 4530205053312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335050203547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26754229 + ... + 27540131.

It is an arithmetic number, because the mean of its divisors is an integer number (1244548929456).

Almost surely, 2^{21335050203540} is an apocalyptic number.

21335050203540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21335050203540 is an abundant number, since it is smaller than the sum of its proper divisors (38403298410348).

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

21335050203540 is a wasteful number, since it uses less digits than its factorization.

21335050203540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238368 (or 1238366 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 21335050203540 its reverse (4530205053312), we get a palindrome (25865255256852).

The spelling of 21335050203540 in words is "twenty-one trillion, three hundred thirty-five billion, fifty million, two hundred three thousand, five hundred forty".