21420046477200 has 240 divisors, whose sum is σ = 80947376623616. Its totient is φ = 4738074739200.

The previous prime is 21420046477187. The next prime is 21420046477211. The reversal of 21420046477200 is 277464002412.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40868722 + ... + 41389521.

Almost surely, 2^{21420046477200} is an apocalyptic number.

21420046477200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21420046477200 is an abundant number, since it is smaller than the sum of its proper divisors (59527330146416).

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

21420046477200 is a wasteful number, since it uses less digits than its factorization.

21420046477200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82258302 (or 82258291 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 39.

The spelling of 21420046477200 in words is "twenty-one trillion, four hundred twenty billion, forty-six million, four hundred seventy-seven thousand, two hundred".