21046666206480 has 160 divisors (see below), whose sum is σ = 68085164342016. Its totient is φ = 5368127373312.

The previous prime is 21046666206451. The next prime is 21046666206493. The reversal of 21046666206480 is 8460266664012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109824024 + ... + 110015496.

Almost surely, 2^{21046666206480} is an apocalyptic number.

21046666206480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21046666206480 is an abundant number, since it is smaller than the sum of its proper divisors (47038498135536).

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

21046666206480 is a wasteful number, since it uses less digits than its factorization.

21046666206480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211425 (or 211419 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 51.

The spelling of 21046666206480 in words is "twenty-one trillion, forty-six billion, six hundred sixty-six million, two hundred six thousand, four hundred eighty".