21056146433 has 16 divisors (see below), whose sum is σ = 25566710400. Its totient is φ = 16928468736.

The previous prime is 21056146429. The next prime is 21056146451. The reversal of 21056146433 is 33464165012.

It is a cyclic number.

It is not a de Polignac number, because 21056146433 - 2² = 21056146429 is a prime.

It is a super-3 number, since 3×21056146433³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21056146393 and 21056146402.

It is not an unprimeable number, because it can be changed into a prime (21056146633) 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, 267083 + ... + 336816.

It is an arithmetic number, because the mean of its divisors is an integer number (1597919400).

Almost surely, 2^21056146433 is an apocalyptic number.

It is an amenable number.

21056146433 is a deficient number, since it is larger than the sum of its proper divisors (4510563967).

21056146433 is a wasteful number, since it uses less digits than its factorization.

21056146433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604216.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 21056146433 in words is "twenty-one billion, fifty-six million, one hundred forty-six thousand, four hundred thirty-three".