21170416794037 has 16 divisors (see below), whose sum is σ = 24616414662912. Its totient is φ = 17830437333120.

The previous prime is 21170416794029. The next prime is 21170416794053. The reversal of 21170416794037 is 73049761407112.

It is a cyclic number.

It is not a de Polignac number, because 21170416794037 - 2³ = 21170416794029 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 (21170416794077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24798688 + ... + 25638169.

It is an arithmetic number, because the mean of its divisors is an integer number (1538525916432).

Almost surely, 2^{21170416794037} is an apocalyptic number.

It is an amenable number.

21170416794037 is a deficient number, since it is larger than the sum of its proper divisors (3445997868875).

21170416794037 is an equidigital number, since it uses as much as digits as its factorization.

21170416794037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50437908.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 21170416794037 in words is "twenty-one trillion, one hundred seventy billion, four hundred sixteen million, seven hundred ninety-four thousand, thirty-seven".