21160315634540 has 12 divisors (see below), whose sum is σ = 44436662832576. Its totient is φ = 8464126253808.

The previous prime is 21160315634537. The next prime is 21160315634599. The reversal of 21160315634540 is 4543651306112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529007890844 + ... + 529007890883.

It is an arithmetic number, because the mean of its divisors is an integer number (3703055236048).

Almost surely, 2^{21160315634540} is an apocalyptic number.

21160315634540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21160315634540 is an abundant number, since it is smaller than the sum of its proper divisors (23276347198036).

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

21160315634540 is a wasteful number, since it uses less digits than its factorization.

21160315634540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058015781736 (or 1058015781734 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21160315634540 in words is "twenty-one trillion, one hundred sixty billion, three hundred fifteen million, six hundred thirty-four thousand, five hundred forty".