21075153464128 has 28 divisors (see below), whose sum is σ = 42324875228160. Its totient is φ = 10410617973632.

The previous prime is 21075153464069. The next prime is 21075153464137. The reversal of 21075153464128 is 82146435157012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983725248 + ... + 1983735871.

It is an arithmetic number, because the mean of its divisors is an integer number (1511602686720).

Almost surely, 2^{21075153464128} is an apocalyptic number.

It is an amenable number.

21075153464128 is an abundant number, since it is smaller than the sum of its proper divisors (21249721764032).

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

21075153464128 is an equidigital number, since it uses as much as digits as its factorization.

21075153464128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967461214 (or 3967461204 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 21075153464128 in words is "twenty-one trillion, seventy-five billion, one hundred fifty-three million, four hundred sixty-four thousand, one hundred twenty-eight".