21340102032540 has 72 divisors (see below), whose sum is σ = 64741306488768. Its totient is φ = 5689844323200.

The previous prime is 21340102032539. The next prime is 21340102032547. The reversal of 21340102032540 is 4523020104312.

21340102032540 is a `hidden beast` number, since 2 + 1 + 3 + 401 + 0 + 2 + 0 + 3 + 254 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340102032547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7639972 + ... + 10052331.

It is an arithmetic number, because the mean of its divisors is an integer number (899184812344).

Almost surely, 2^{21340102032540} is an apocalyptic number.

21340102032540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21340102032540 is an abundant number, since it is smaller than the sum of its proper divisors (43401204456228).

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

21340102032540 is a wasteful number, since it uses less digits than its factorization.

21340102032540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17699019 (or 17699014 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21340102032540 its reverse (4523020104312), we get a palindrome (25863122136852).

The spelling of 21340102032540 in words is "twenty-one trillion, three hundred forty billion, one hundred two million, thirty-two thousand, five hundred forty".