21143086404 has 48 divisors (see below), whose sum is σ = 54033267456. Its totient is φ = 6381460000.

The previous prime is 21143086397. The next prime is 21143086477. The reversal of 21143086404 is 40468034112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285942 + ... + 352205.

It is an arithmetic number, because the mean of its divisors is an integer number (1125693072).

Almost surely, 2^21143086404 is an apocalyptic number.

It is an amenable number.

21143086404 is an abundant number, since it is smaller than the sum of its proper divisors (32890181052).

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

21143086404 is a wasteful number, since it uses less digits than its factorization.

21143086404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638416 (or 638414 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 21143086404 in words is "twenty-one billion, one hundred forty-three million, eighty-six thousand, four hundred four".