21053410513000 has 64 divisors (see below), whose sum is σ = 49270747191120. Its totient is φ = 8420378464000.

The previous prime is 21053410512929. The next prime is 21053410513073. The reversal of 21053410513000 is 31501435012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 77944822596 + 20975465690404 = 279186^2 + 4579898^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7345110 + ... + 9800890.

Almost surely, 2^{21053410513000} is an apocalyptic number.

21053410513000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21053410513000 is an abundant number, since it is smaller than the sum of its proper divisors (28217336678120).

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

21053410513000 is a wasteful number, since it uses less digits than its factorization.

21053410513000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464375 (or 2464361 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21053410513000 its reverse (31501435012), we get a palindrome (21084911948012).

The spelling of 21053410513000 in words is "twenty-one trillion, fifty-three billion, four hundred ten million, five hundred thirteen thousand".