21890366718337 has 16 divisors (see below), whose sum is σ = 24838601744320. Its totient is φ = 19124778456000.

The previous prime is 21890366718331. The next prime is 21890366718349. The reversal of 21890366718337 is 73381766309812.

It is a cyclic number.

It is not a de Polignac number, because 21890366718337 - 2¹⁵ = 21890366685569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21890366718331) 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, 41902614 + ... + 42421807.

It is an arithmetic number, because the mean of its divisors is an integer number (1552412609020).

Almost surely, 2^{21890366718337} is an apocalyptic number.

It is an amenable number.

21890366718337 is a deficient number, since it is larger than the sum of its proper divisors (2948235025983).

21890366718337 is a wasteful number, since it uses less digits than its factorization.

21890366718337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84325504.

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 21890366718337 in words is "twenty-one trillion, eight hundred ninety billion, three hundred sixty-six million, seven hundred eighteen thousand, three hundred thirty-seven".