21026322361540 has 96 divisors (see below), whose sum is σ = 45242898624000. Its totient is φ = 8206446743040.

The previous prime is 21026322361523. The next prime is 21026322361547. The reversal of 21026322361540 is 4516322362012.

It is a self number, because there is not a number n which added to its sum of digits gives 21026322361540.

It is not an unprimeable number, because it can be changed into a prime (21026322361547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46151055 + ... + 46604425.

It is an arithmetic number, because the mean of its divisors is an integer number (471280194000).

Almost surely, 2^{21026322361540} is an apocalyptic number.

21026322361540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21026322361540 is an abundant number, since it is smaller than the sum of its proper divisors (24216576262460).

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

21026322361540 is a wasteful number, since it uses less digits than its factorization.

21026322361540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453805 (or 453803 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 21026322361540 in words is "twenty-one trillion, twenty-six billion, three hundred twenty-two million, three hundred sixty-one thousand, five hundred forty".