21434355453140 has 96 divisors (see below), whose sum is σ = 54997300560384. Its totient is φ = 6849480499200.

The previous prime is 21434355453061. The next prime is 21434355453163. The reversal of 21434355453140 is 4135455343412.

It is a junction number, because it is equal to n+sod(n) for n = 21434355453091 and 21434355453100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43473461 + ... + 43963740.

It is an arithmetic number, because the mean of its divisors is an integer number (572888547504).

Almost surely, 2^{21434355453140} is an apocalyptic number.

21434355453140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21434355453140 is an abundant number, since it is smaller than the sum of its proper divisors (33562945107244).

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

21434355453140 is a wasteful number, since it uses less digits than its factorization.

21434355453140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87437337 (or 87437335 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 21434355453140 in words is "twenty-one trillion, four hundred thirty-four billion, three hundred fifty-five million, four hundred fifty-three thousand, one hundred forty".