21115541065046 has 4 divisors (see below), whose sum is σ = 31673311597572. Its totient is φ = 10557770532522.

The previous prime is 21115541064983. The next prime is 21115541065051. The reversal of 21115541065046 is 64056014551112.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21115541064994 and 21115541065012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278885266260 + ... + 5278885266263.

It is an arithmetic number, because the mean of its divisors is an integer number (7918327899393).

Almost surely, 2^{21115541065046} is an apocalyptic number.

21115541065046 is a deficient number, since it is larger than the sum of its proper divisors (10557770532526).

21115541065046 is a wasteful number, since it uses less digits than its factorization.

21115541065046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557770532525.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 21115541065046 in words is "twenty-one trillion, one hundred fifteen billion, five hundred forty-one million, sixty-five thousand, forty-six".