21353420754 has 48 divisors (see below), whose sum is σ = 48290883264. Its totient is φ = 6806421600.

The previous prime is 21353420659. The next prime is 21353420771. The reversal of 21353420754 is 45702435312.

It is a super-3 number, since 3×21353420754³ (a number of 32 digits) contains 333 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 23 ways as a sum of consecutive naturals, for example, 2571349 + ... + 2579639.

It is an arithmetic number, because the mean of its divisors is an integer number (1006060068).

Almost surely, 2^21353420754 is an apocalyptic number.

21353420754 is an abundant number, since it is smaller than the sum of its proper divisors (26937462510).

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

21353420754 is a wasteful number, since it uses less digits than its factorization.

21353420754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14543 (or 14540 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 21353420754 in words is "twenty-one billion, three hundred fifty-three million, four hundred twenty thousand, seven hundred fifty-four".