21604006217610 has 32 divisors (see below), whose sum is σ = 57610683247680. Its totient is φ = 5761068324624.

The previous prime is 21604006217609. The next prime is 21604006217653. The reversal of 21604006217610 is 1671260040612.

21604006217610 is a `hidden beast` number, since 2 + 16 + 0 + 4 + 0 + 0 + 6 + 21 + 7 + 610 = 666.

It is a super-2 number, since 2×21604006217610² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40007418652 + ... + 40007419191.

It is an arithmetic number, because the mean of its divisors is an integer number (1800333851490).

Almost surely, 2^{21604006217610} is an apocalyptic number.

21604006217610 is an abundant number, since it is smaller than the sum of its proper divisors (36006677030070).

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

21604006217610 is a wasteful number, since it uses less digits than its factorization.

21604006217610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80014837859 (or 80014837853 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 21604006217610 in words is "twenty-one trillion, six hundred four billion, six million, two hundred seventeen thousand, six hundred ten".