21437942790841 has 8 divisors (see below), whose sum is σ = 22383930360960. Its totient is φ = 20493113812512.

The previous prime is 21437942790793. The next prime is 21437942790851. The reversal of 21437942790841 is 14809724973412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21437942790841 - 2²⁷ = 21437808573113 is a prime.

It is a super-2 number, since 2×21437942790841² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21437942790841.

It is not an unprimeable number, because it can be changed into a prime (21437942790851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289610125 + ... + 289684138.

It is an arithmetic number, because the mean of its divisors is an integer number (2797991295120).

Almost surely, 2^{21437942790841} is an apocalyptic number.

It is an amenable number.

21437942790841 is a deficient number, since it is larger than the sum of its proper divisors (945987570119).

21437942790841 is a wasteful number, since it uses less digits than its factorization.

21437942790841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579295895.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 21437942790841 in words is "twenty-one trillion, four hundred thirty-seven billion, nine hundred forty-two million, seven hundred ninety thousand, eight hundred forty-one".