21700553578284 has 96 divisors (see below), whose sum is σ = 59736386174976. Its totient is φ = 5999999480640.

The previous prime is 21700553578279. The next prime is 21700553578387. The reversal of 21700553578284 is 48287535500712.

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, 134032909 + ... + 134194715.

It is an arithmetic number, because the mean of its divisors is an integer number (622254022656).

Almost surely, 2^{21700553578284} is an apocalyptic number.

It is an amenable number.

21700553578284 is an abundant number, since it is smaller than the sum of its proper divisors (38035832596692).

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

21700553578284 is a wasteful number, since it uses less digits than its factorization.

21700553578284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213355 (or 213353 counting only the distinct ones).

The product of its (nonzero) digits is 18816000, while the sum is 57.

The spelling of 21700553578284 in words is "twenty-one trillion, seven hundred billion, five hundred fifty-three million, five hundred seventy-eight thousand, two hundred eighty-four".