21514414032440 has 64 divisors (see below), whose sum is σ = 55328204252160. Its totient is φ = 7375647150720.

The previous prime is 21514414032413. The next prime is 21514414032443. The reversal of 21514414032440 is 4423041441512.

It is a super-2 number, since 2×21514414032440² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 21514414032440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514414032443) 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, 903392 + ... + 6621551.

It is an arithmetic number, because the mean of its divisors is an integer number (864503191440).

Almost surely, 2^{21514414032440} is an apocalyptic number.

21514414032440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21514414032440 is an abundant number, since it is smaller than the sum of its proper divisors (33813790219720).

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

21514414032440 is a wasteful number, since it uses less digits than its factorization.

21514414032440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535172 (or 7535168 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 21514414032440 its reverse (4423041441512), we get a palindrome (25937455473952).

The spelling of 21514414032440 in words is "twenty-one trillion, five hundred fourteen billion, four hundred fourteen million, thirty-two thousand, four hundred forty".