21354743037407 has 16 divisors (see below), whose sum is σ = 23341534712832. Its totient is φ = 19417133276640.

The previous prime is 21354743037391. The next prime is 21354743037421. The reversal of 21354743037407 is 70473034745312.

It is a cyclic number.

It is not a de Polignac number, because 21354743037407 - 2⁴ = 21354743037391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354743037307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23530682 + ... + 24421352.

It is an arithmetic number, because the mean of its divisors is an integer number (1458845919552).

Almost surely, 2^{21354743037407} is an apocalyptic number.

21354743037407 is a deficient number, since it is larger than the sum of its proper divisors (1986791675425).

21354743037407 is a wasteful number, since it uses less digits than its factorization.

21354743037407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918278.

The product of its (nonzero) digits is 5927040, while the sum is 50.

The spelling of 21354743037407 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-three million, thirty-seven thousand, four hundred seven".