21340688881480 has 16 divisors (see below), whose sum is σ = 48016549983420. Its totient is φ = 8536275552576.

The previous prime is 21340688881459. The next prime is 21340688881517. The reversal of 21340688881480 is 8418888604312.

It can be written as a sum of positive squares in 2 ways, for example, as 21340463941476 + 224940004 = 4619574^2 + 14998^2 .

It is a super-2 number, since 2×21340688881480² (a number of 27 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 266758610979 + ... + 266758611058.

Almost surely, 2^{21340688881480} is an apocalyptic number.

21340688881480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21340688881480 is an abundant number, since it is smaller than the sum of its proper divisors (26675861101940).

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

21340688881480 is a wasteful number, since it uses less digits than its factorization.

21340688881480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533517222048 (or 533517222044 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 61.

The spelling of 21340688881480 in words is "twenty-one trillion, three hundred forty billion, six hundred eighty-eight million, eight hundred eighty-one thousand, four hundred eighty".