4723256021 has 8 divisors (see below), whose sum is σ = 5157244704. Its totient is φ = 4290034320.

The previous prime is 4723255993. The next prime is 4723256059. The reversal of 4723256021 is 1206523274.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4723256021 - 2²² = 4719061717 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 (4723256521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178826 + ... + 203531.

It is an arithmetic number, because the mean of its divisors is an integer number (644655588).

Almost surely, 2^4723256021 is an apocalyptic number.

It is an amenable number.

4723256021 is a deficient number, since it is larger than the sum of its proper divisors (433988683).

4723256021 is a wasteful number, since it uses less digits than its factorization.

4723256021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383491.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 4723256021 is about 68725.9486729721. The cubic root of 4723256021 is about 1677.8269358625.

Adding to 4723256021 its reverse (1206523274), we get a palindrome (5929779295).

The spelling of 4723256021 in words is "four billion, seven hundred twenty-three million, two hundred fifty-six thousand, twenty-one".