21406662607100 has 18 divisors (see below), whose sum is σ = 46452457857624. Its totient is φ = 8562665042800.

The previous prime is 21406662607097. The next prime is 21406662607103. The reversal of 21406662607100 is 170626660412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21406662607097) and next prime (21406662607103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21406662607103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107033312936 + ... + 107033313135.

Almost surely, 2^{21406662607100} is an apocalyptic number.

21406662607100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21406662607100 is an abundant number, since it is smaller than the sum of its proper divisors (25045795250524).

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

21406662607100 is a wasteful number, since it uses less digits than its factorization.

21406662607100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214066626085 (or 214066626078 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 21406662607100 in words is "twenty-one trillion, four hundred six billion, six hundred sixty-two million, six hundred seven thousand, one hundred".