21440530521454 has 32 divisors (see below), whose sum is σ = 35317746922752. Its totient is φ = 9680909400000.

The previous prime is 21440530521433. The next prime is 21440530521457. The reversal of 21440530521454 is 45412503504412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440530521457) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 221200069 + ... + 221296975.

It is an arithmetic number, because the mean of its divisors is an integer number (1103679591336).

Almost surely, 2^{21440530521454} is an apocalyptic number.

21440530521454 is a deficient number, since it is larger than the sum of its proper divisors (13877216401298).

21440530521454 is a wasteful number, since it uses less digits than its factorization.

21440530521454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163672.

The product of its (nonzero) digits is 384000, while the sum is 40.

The spelling of 21440530521454 in words is "twenty-one trillion, four hundred forty billion, five hundred thirty million, five hundred twenty-one thousand, four hundred fifty-four".