28421021453 has 16 divisors (see below), whose sum is σ = 31611301056. Its totient is φ = 25335930240.

The previous prime is 28421021449. The next prime is 28421021459. The reversal of 28421021453 is 35412012482.

It is a cyclic number.

It is not a de Polignac number, because 28421021453 - 2² = 28421021449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28421021459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36626 + ... + 241212.

It is an arithmetic number, because the mean of its divisors is an integer number (1975706316).

Almost surely, 2^28421021453 is an apocalyptic number.

It is an amenable number.

28421021453 is a deficient number, since it is larger than the sum of its proper divisors (3190279603).

28421021453 is a wasteful number, since it uses less digits than its factorization.

28421021453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204844.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 28421021453 in words is "twenty-eight billion, four hundred twenty-one million, twenty-one thousand, four hundred fifty-three".